https://ironegg.com.cn/study/StudyHugoBlox Kit (https://hugoblox.com)en-ushttps://ironegg.com.cn/media/icon_hu_29d01506278977f5.pnghttps://ironegg.com.cn/study/https://ironegg.com.cn/study/calculus/Mon, 01 Jan 0001 00:00:00 +0000https://ironegg.com.cn/study/calculus/<p>I follow MIT&rsquo;s open courses to explore key derivations. Starting with single-variable calculus and progressing toward multivariable calculus, I share my notes, worked examples, and reflections on the learning way.</p> <p><strong>Courses:</strong> . . </p> <style> .ie-document { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 1rem 0; padding: 18px; border: 1px solid #c8d5e1; border-radius: 12px; background: linear-gradient(135deg, #f7fafc, #e8eff5); color: #334155; font-family: inherit; } .ie-document__body { min-width: 0; } .ie-document__kind { display: block; margin: 0 0 5px; color: #47667f; font-family: inherit; font-size: 12px; font-weight: 600; line-height: 1.4; } .ie-document__title { margin: 0; color: #1c3a50; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; } .ie-document__description { margin: 8px 0 0; color: inherit; font-family: inherit; font-size: 0.95rem; line-height: 1.6; overflow-wrap: anywhere; } .ie-document__actions { display: flex; flex-shrink: 0; flex-wrap: wrap; gap: 10px; margin-top: 0; } .ie-document__link { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px 14px; border: 1px solid #b7cbdc; border-radius: 8px; background: #e3eef6; color: #203c51; font-family: inherit; font-size: 0.9rem; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none; } .ie-document__link--download { background: transparent; } .ie-document__link:focus-visible { outline: 2px solid #2b6cb0; outline-offset: 3px; } html.dark .ie-document { border-color: #435366; background: linear-gradient(135deg, #253647, #1c2b38); color: #dce5ec; } html.dark .ie-document__kind { color: #a9c7df; } html.dark .ie-document__title { color: #d4e7f6; } html.dark .ie-document__link { border-color: #5a7186; background: #2b4255; color: #deedf8; } html.dark .ie-document__link--download { background: transparent; } html.dark .ie-document__link:focus-visible { outline-color: #b9dbf5; } @media (max-width: 620px) { .ie-document { flex-direction: column; align-items: flex-start; gap: 0; } .ie-document__actions { margin-top: 12px; } } </style> <article class="ie-document" aria-label="Derivative and Differentiation"> <div class="ie-document__body"> <span class="ie-document__kind"> No. 002 · <time datetime="2026-10-06">2026-10-06</time> · Notes </span> <h3 class="ie-document__title">Derivative and Differentiation</h3> <p class="ie-document__description">derivative 导数; differentiation 求导; product rule 乘积法则; chain rule 链式法则; implicit differentiation 隐函数求导; inverse function differentiation 反函数求导</p> </div> <div class="ie-document__actions"> <a class="ie-document__link" href="https://ironegg.com.cn/study/calculus/calculus_002_differentiation.pdf" target="_blank" rel="noopener" aria-label="Read PDF: Derivative and Differentiation">Read PDF</a> </div> </article> <style> .ie-document { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 1rem 0; padding: 18px; border: 1px solid #c8d5e1; border-radius: 12px; background: linear-gradient(135deg, #f7fafc, #e8eff5); color: #334155; font-family: inherit; } .ie-document__body { min-width: 0; } .ie-document__kind { display: block; margin: 0 0 5px; color: #47667f; font-family: inherit; font-size: 12px; font-weight: 600; line-height: 1.4; } .ie-document__title { margin: 0; color: #1c3a50; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; } .ie-document__description { margin: 8px 0 0; color: inherit; font-family: inherit; font-size: 0.95rem; line-height: 1.6; overflow-wrap: anywhere; } .ie-document__actions { display: flex; flex-shrink: 0; flex-wrap: wrap; gap: 10px; margin-top: 0; } .ie-document__link { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px 14px; border: 1px solid #b7cbdc; border-radius: 8px; background: #e3eef6; color: #203c51; font-family: inherit; font-size: 0.9rem; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none; } .ie-document__link--download { background: transparent; } .ie-document__link:focus-visible { outline: 2px solid #2b6cb0; outline-offset: 3px; } html.dark .ie-document { border-color: #435366; background: linear-gradient(135deg, #253647, #1c2b38); color: #dce5ec; } html.dark .ie-document__kind { color: #a9c7df; } html.dark .ie-document__title { color: #d4e7f6; } html.dark .ie-document__link { border-color: #5a7186; background: #2b4255; color: #deedf8; } html.dark .ie-document__link--download { background: transparent; } html.dark .ie-document__link:focus-visible { outline-color: #b9dbf5; } @media (max-width: 620px) { .ie-document { flex-direction: column; align-items: flex-start; gap: 0; } .ie-document__actions { margin-top: 12px; } } </style> <article class="ie-document" aria-label="Limits"> <div class="ie-document__body"> <span class="ie-document__kind"> No. 001 · <time datetime="2026-05-23">2026-05-23</time> · Notes </span> <h3 class="ie-document__title">Limits</h3> <p class="ie-document__description">limits 极限; continuity 连续性</p> </div> <div class="ie-document__actions"> <a class="ie-document__link" href="https://ironegg.com.cn/study/calculus/calculus_001_limits.pdf" target="_blank" rel="noopener" aria-label="Read PDF: Limits">Read PDF</a> </div> </article>https://ironegg.com.cn/study/discretemathematics/Mon, 01 Jan 0001 00:00:00 +0000https://ironegg.com.cn/study/discretemathematics/<p>I study physics to understand how people and firms make choices, how markets allocate resources, and how policies affect economic outcomes. This page collects my notes, diagrams, worked examples, and reflections as I connect economic models with everyday questions.</p> <h2 id="notes">Notes</h2> <p>Notes will be added as I study.</p>https://ironegg.com.cn/study/linearalgebra/Mon, 01 Jan 0001 00:00:00 +0000https://ironegg.com.cn/study/linearalgebra/<p>Through MIT&rsquo;s &ldquo;Linear Algebra and NxN Systems&rdquo;, I explored foundational linear algebra, with a focus on square matrices and systems of differential equations. Studying these ideas helped me connect matrix calculations with the behavior of a system. I plan to build on this foundation through further study in mathematical modeling.</p> <p><strong>Course:</strong> </p> <h2 id="certificate">Certificate</h2> <style> .ie-document { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 1rem 0; padding: 18px; border: 1px solid #c8d5e1; border-radius: 12px; background: linear-gradient(135deg, #f7fafc, #e8eff5); color: #334155; font-family: inherit; } .ie-document__body { min-width: 0; } .ie-document__kind { display: block; margin: 0 0 5px; color: #47667f; font-family: inherit; font-size: 12px; font-weight: 600; line-height: 1.4; } .ie-document__title { margin: 0; color: #1c3a50; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; } .ie-document__description { margin: 8px 0 0; color: inherit; font-family: inherit; font-size: 0.95rem; line-height: 1.6; overflow-wrap: anywhere; } .ie-document__actions { display: flex; flex-shrink: 0; flex-wrap: wrap; gap: 10px; margin-top: 0; } .ie-document__link { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px 14px; border: 1px solid #b7cbdc; border-radius: 8px; background: #e3eef6; color: #203c51; font-family: inherit; font-size: 0.9rem; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none; } .ie-document__link--download { background: transparent; } .ie-document__link:focus-visible { outline: 2px solid #2b6cb0; outline-offset: 3px; } html.dark .ie-document { border-color: #435366; background: linear-gradient(135deg, #253647, #1c2b38); color: #dce5ec; } html.dark .ie-document__kind { color: #a9c7df; } html.dark .ie-document__title { color: #d4e7f6; } html.dark .ie-document__link { border-color: #5a7186; background: #2b4255; color: #deedf8; } html.dark .ie-document__link--download { background: transparent; } html.dark .ie-document__link:focus-visible { outline-color: #b9dbf5; } @media (max-width: 620px) { .ie-document { flex-direction: column; align-items: flex-start; gap: 0; } .ie-document__actions { margin-top: 12px; } } </style> <article class="ie-document" aria-label="MITx 18.03.3x - Course Completion Certificate"> <div class="ie-document__body"> <span class="ie-document__kind"> No. 002 · <time datetime="2026-10-08">2026-10-08</time> · Notes </span> <h3 class="ie-document__title">MITx 18.03.3x - Course Completion Certificate</h3> </div> <div class="ie-document__actions"> <a class="ie-document__link" href="https://ironegg.com.cn/study/linearalgebra/linearalgebra-certificate.pdf" target="_blank" rel="noopener" aria-label="Read PDF: MITx 18.03.3x - Course Completion Certificate">Read PDF</a> </div> </article> <h2 id="notes">Notes</h2> <style> .ie-document { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 1rem 0; padding: 18px; border: 1px solid #c8d5e1; border-radius: 12px; background: linear-gradient(135deg, #f7fafc, #e8eff5); color: #334155; font-family: inherit; } .ie-document__body { min-width: 0; } .ie-document__kind { display: block; margin: 0 0 5px; color: #47667f; font-family: inherit; font-size: 12px; font-weight: 600; line-height: 1.4; } .ie-document__title { margin: 0; color: #1c3a50; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; } .ie-document__description { margin: 8px 0 0; color: inherit; font-family: inherit; font-size: 0.95rem; line-height: 1.6; overflow-wrap: anywhere; } .ie-document__actions { display: flex; flex-shrink: 0; flex-wrap: wrap; gap: 10px; margin-top: 0; } .ie-document__link { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px 14px; border: 1px solid #b7cbdc; border-radius: 8px; background: #e3eef6; color: #203c51; font-family: inherit; font-size: 0.9rem; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none; } .ie-document__link--download { background: transparent; } .ie-document__link:focus-visible { outline: 2px solid #2b6cb0; outline-offset: 3px; } html.dark .ie-document { border-color: #435366; background: linear-gradient(135deg, #253647, #1c2b38); color: #dce5ec; } html.dark .ie-document__kind { color: #a9c7df; } html.dark .ie-document__title { color: #d4e7f6; } html.dark .ie-document__link { border-color: #5a7186; background: #2b4255; color: #deedf8; } html.dark .ie-document__link--download { background: transparent; } html.dark .ie-document__link:focus-visible { outline-color: #b9dbf5; } @media (max-width: 620px) { .ie-document { flex-direction: column; align-items: flex-start; gap: 0; } .ie-document__actions { margin-top: 12px; } } </style> <article class="ie-document" aria-label="Linear Algebra - Lecture Notes"> <div class="ie-document__body"> <span class="ie-document__kind"> No. 001 · <time datetime="2026-08-24">2026-08-24</time> · Notes </span> <h3 class="ie-document__title">Linear Algebra - Lecture Notes</h3> <p class="ie-document__description">Gaussian elimination 高斯消元法; vector spaces 向量空间; basis and dimension 基与维数; column space and nullspace 列空间与零空间; rank-nullity theorem 秩-零度定理; eigenvalues and eigenvectors 特征值与特征向量; systems of differential equations 微分方程组; coupled oscillators 耦合振子; Jacobian matrix 雅可比矩阵; stability analysis 稳定性分析; Lotka-Volterra model 洛特卡-沃尔泰拉模型; zipline modeling 滑索建模</p> </div> <div class="ie-document__actions"> <a class="ie-document__link" href="https://ironegg.com.cn/study/linearalgebra/linearalgebra_001_nxnsystems.pdf" target="_blank" rel="noopener" aria-label="Read PDF: Linear Algebra - Lecture Notes">Read PDF</a> </div> </article>https://ironegg.com.cn/study/microeconomics/Mon, 01 Jan 0001 00:00:00 +0000https://ironegg.com.cn/study/microeconomics/<p>I study microeconomics to understand how people and firms make choices, how markets allocate resources, and how policies affect economic outcomes. This page collects my notes, diagrams, worked examples, and reflections as I connect economic models with everyday questions.</p> <style> .ie-document { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 1rem 0; padding: 18px; border: 1px solid #c8d5e1; border-radius: 12px; background: linear-gradient(135deg, #f7fafc, #e8eff5); color: #334155; font-family: inherit; } .ie-document__body { min-width: 0; } .ie-document__kind { display: block; margin: 0 0 5px; color: #47667f; font-family: inherit; font-size: 12px; font-weight: 600; line-height: 1.4; } .ie-document__title { margin: 0; color: #1c3a50; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; } .ie-document__description { margin: 8px 0 0; color: inherit; font-family: inherit; font-size: 0.95rem; line-height: 1.6; overflow-wrap: anywhere; } .ie-document__actions { display: flex; flex-shrink: 0; flex-wrap: wrap; gap: 10px; margin-top: 0; } .ie-document__link { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px 14px; border: 1px solid #b7cbdc; border-radius: 8px; background: #e3eef6; color: #203c51; font-family: inherit; font-size: 0.9rem; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none; } .ie-document__link--download { background: transparent; } .ie-document__link:focus-visible { outline: 2px solid #2b6cb0; outline-offset: 3px; } html.dark .ie-document { border-color: #435366; background: linear-gradient(135deg, #253647, #1c2b38); color: #dce5ec; } html.dark .ie-document__kind { color: #a9c7df; } html.dark .ie-document__title { color: #d4e7f6; } html.dark .ie-document__link { border-color: #5a7186; background: #2b4255; color: #deedf8; } html.dark .ie-document__link--download { background: transparent; } html.dark .ie-document__link:focus-visible { outline-color: #b9dbf5; } @media (max-width: 620px) { .ie-document { flex-direction: column; align-items: flex-start; gap: 0; } .ie-document__actions { margin-top: 12px; } } </style> <article class="ie-document" aria-label="Production and short-run costs"> <div class="ie-document__body"> <span class="ie-document__kind"> No. 003 · <time datetime="2026-10-07">2026-10-07</time> · Notes </span> <h3 class="ie-document__title">Production and short-run costs</h3> <p class="ie-document__description">Marginal product, marginal cost, and average costs.</p> </div> <div class="ie-document__actions"> <a class="ie-document__link" href="https://ironegg.com.cn/study/microeconomics/production-and-short-run-costs.pdf" target="_blank" rel="noopener" aria-label="Read PDF: Production and short-run costs">Read PDF</a> </div> </article> <style> .ie-document { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 1rem 0; padding: 18px; border: 1px solid #c8d5e1; border-radius: 12px; background: linear-gradient(135deg, #f7fafc, #e8eff5); color: #334155; font-family: inherit; } .ie-document__body { min-width: 0; } .ie-document__kind { display: block; margin: 0 0 5px; color: #47667f; font-family: inherit; font-size: 12px; font-weight: 600; line-height: 1.4; } .ie-document__title { margin: 0; color: #1c3a50; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; } .ie-document__description { margin: 8px 0 0; color: inherit; font-family: inherit; font-size: 0.95rem; line-height: 1.6; overflow-wrap: anywhere; } .ie-document__actions { display: flex; flex-shrink: 0; flex-wrap: wrap; gap: 10px; margin-top: 0; } .ie-document__link { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px 14px; border: 1px solid #b7cbdc; border-radius: 8px; background: #e3eef6; color: #203c51; font-family: inherit; font-size: 0.9rem; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none; } .ie-document__link--download { background: transparent; } .ie-document__link:focus-visible { outline: 2px solid #2b6cb0; outline-offset: 3px; } html.dark .ie-document { border-color: #435366; background: linear-gradient(135deg, #253647, #1c2b38); color: #dce5ec; } html.dark .ie-document__kind { color: #a9c7df; } html.dark .ie-document__title { color: #d4e7f6; } html.dark .ie-document__link { border-color: #5a7186; background: #2b4255; color: #deedf8; } html.dark .ie-document__link--download { background: transparent; } html.dark .ie-document__link:focus-visible { outline-color: #b9dbf5; } @media (max-width: 620px) { .ie-document { flex-direction: column; align-items: flex-start; gap: 0; } .ie-document__actions { margin-top: 12px; } } </style> <article class="ie-document" aria-label="Price elasticity of demand"> <div class="ie-document__body"> <span class="ie-document__kind"> No. 002 · <time datetime="2026-10-07">2026-10-07</time> · Notes </span> <h3 class="ie-document__title">Price elasticity of demand</h3> <p class="ie-document__description">The midpoint method and its relationship with revenue.</p> </div> <div class="ie-document__actions"> <a class="ie-document__link" href="https://ironegg.com.cn/study/microeconomics/price-elasticity-of-demand.pdf" target="_blank" rel="noopener" aria-label="Read PDF: Price elasticity of demand">Read PDF</a> </div> </article> <style> .ie-document { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 1rem 0; padding: 18px; border: 1px solid #c8d5e1; border-radius: 12px; background: linear-gradient(135deg, #f7fafc, #e8eff5); color: #334155; font-family: inherit; } .ie-document__body { min-width: 0; } .ie-document__kind { display: block; margin: 0 0 5px; color: #47667f; font-family: inherit; font-size: 12px; font-weight: 600; line-height: 1.4; } .ie-document__title { margin: 0; color: #1c3a50; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; } .ie-document__description { margin: 8px 0 0; color: inherit; font-family: inherit; font-size: 0.95rem; line-height: 1.6; overflow-wrap: anywhere; } .ie-document__actions { display: flex; flex-shrink: 0; flex-wrap: wrap; gap: 10px; margin-top: 0; } .ie-document__link { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px 14px; border: 1px solid #b7cbdc; border-radius: 8px; background: #e3eef6; color: #203c51; font-family: inherit; font-size: 0.9rem; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none; } .ie-document__link--download { background: transparent; } .ie-document__link:focus-visible { outline: 2px solid #2b6cb0; outline-offset: 3px; } html.dark .ie-document { border-color: #435366; background: linear-gradient(135deg, #253647, #1c2b38); color: #dce5ec; } html.dark .ie-document__kind { color: #a9c7df; } html.dark .ie-document__title { color: #d4e7f6; } html.dark .ie-document__link { border-color: #5a7186; background: #2b4255; color: #deedf8; } html.dark .ie-document__link--download { background: transparent; } html.dark .ie-document__link:focus-visible { outline-color: #b9dbf5; } @media (max-width: 620px) { .ie-document { flex-direction: column; align-items: flex-start; gap: 0; } .ie-document__actions { margin-top: 12px; } } </style> <article class="ie-document" aria-label="Supply, demand, and equilibrium"> <div class="ie-document__body"> <span class="ie-document__kind"> No. 001 · <time datetime="2026-10-07">2026-10-07</time> · Notes </span> <h3 class="ie-document__title">Supply, demand, and equilibrium</h3> <p class="ie-document__description">Equilibrium calculations, curve shifts, and movements.</p> </div> <div class="ie-document__actions"> <a class="ie-document__link" href="https://ironegg.com.cn/study/microeconomics/supply-demand-equilibrium.pdf" target="_blank" rel="noopener" aria-label="Read PDF: Supply, demand, and equilibrium">Read PDF</a> </div> </article>https://ironegg.com.cn/study/physics/Mon, 01 Jan 0001 00:00:00 +0000https://ironegg.com.cn/study/physics/<p>I study physics to understand how people and firms make choices, how markets allocate resources, and how policies affect economic outcomes. This page collects my notes, diagrams, worked examples, and reflections as I connect economic models with everyday questions.</p> <style> .ie-document { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 1rem 0; padding: 18px; border: 1px solid #c8d5e1; border-radius: 12px; background: linear-gradient(135deg, #f7fafc, #e8eff5); color: #334155; font-family: inherit; } .ie-document__body { min-width: 0; } .ie-document__kind { display: block; margin: 0 0 5px; color: #47667f; font-family: inherit; font-size: 12px; font-weight: 600; line-height: 1.4; } .ie-document__title { margin: 0; color: #1c3a50; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; } .ie-document__description { margin: 8px 0 0; color: inherit; font-family: inherit; font-size: 0.95rem; line-height: 1.6; overflow-wrap: anywhere; } .ie-document__actions { display: flex; flex-shrink: 0; flex-wrap: wrap; gap: 10px; margin-top: 0; } .ie-document__link { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px 14px; border: 1px solid #b7cbdc; border-radius: 8px; background: #e3eef6; color: #203c51; font-family: inherit; font-size: 0.9rem; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none; } .ie-document__link--download { background: transparent; } .ie-document__link:focus-visible { outline: 2px solid #2b6cb0; outline-offset: 3px; } html.dark .ie-document { border-color: #435366; background: linear-gradient(135deg, #253647, #1c2b38); color: #dce5ec; } html.dark .ie-document__kind { color: #a9c7df; } html.dark .ie-document__title { color: #d4e7f6; } html.dark .ie-document__link { border-color: #5a7186; background: #2b4255; color: #deedf8; } html.dark .ie-document__link--download { background: transparent; } html.dark .ie-document__link:focus-visible { outline-color: #b9dbf5; } @media (max-width: 620px) { .ie-document { flex-direction: column; align-items: flex-start; gap: 0; } .ie-document__actions { margin-top: 12px; } } </style> <article class="ie-document" aria-label="Physics01"> <div class="ie-document__body"> <span class="ie-document__kind"> No. 001 · <time datetime="2026-10-07">2026-10-07</time> · Notes </span> <h3 class="ie-document__title">Physics01</h3> <p class="ie-document__description">Marginal product, marginal cost, and average costs.</p> </div> <div class="ie-document__actions"> <a class="ie-document__link" href="https://ironegg.com.cn/study/physics/physics_notes_01.pdf" target="_blank" rel="noopener" aria-label="Read PDF: Physics01">Read PDF</a> </div> </article>https://ironegg.com.cn/study/systemfunctions/Mon, 01 Jan 0001 00:00:00 +0000https://ironegg.com.cn/study/systemfunctions/<p>I study physics to understand how people and firms make choices, how markets allocate resources, and how policies affect economic outcomes. This page collects my notes, diagrams, worked examples, and reflections as I connect economic models with everyday questions.</p> <h2 id="notes">Notes</h2> <p>Notes will be added as I study.</p>