1 Contents
1.1 Basic
- 2023-03-23, Variable types
- 2023-03-14, Harmonic Mean
- 2026-05-05, Closed Form, Functional Form, Canonical Form
- 1111-11-11, Function
- 2023-01-31, Function
- 2023-01-31, Function (1) - Univariable Scalar Function (One to One)
- 2023-01-31, Function (2) - Multi-variable Scalar Function (Many to One)
- 2023-01-31, Function (3) - Univariable Vector Function (One to Many)
- 2023-01-31, Function (4) - Multi-variable Vector Function (Many to Many)
- 2023-02-18, Function (5) - Composite Function
- 2026-03-23, Function (6) - 함수의 합 vs 합성함수 — Sequential vs Joint 추정
- 2023-02-18, Transformations of Functions
- 2023-03-24, Convex Combination
- 2023-03-18, Higher Order Derivative
- 2023-03-15, Minimizer & Minimum
- 2023-03-15, Taylor Series
- 1111-11-11, Vector & Matrix
- 2023-03-14, Limit, \(\epsilon-\delta\) Method
- Differentiation
- 2023-02-04, Derivative (1) - Univariable Scalar Funtion
- 2023-02-10, Derivative (2) - Chain Rule & Partial Derivative
- 1111-11-11, Derivative (3) - Higher Order Derivative
- 1111-11-11, Derivative (4) - Mean Value Theorem
- 1111-11-11, Derivative (5) - Gradient
- 2023-03-15, Talyer’s Series
- 1111-11-11, Gradient Direction
- 1111-11-11, Random Variable
- 1111-11-11, Probability Distribution
- 1111-11-11, Information Theory - Entropy
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1.2 Linear Algebra
1.2.1 MIT 18.06 Linear Algebra (Gilbert Strang) 강의 시리즈
- 2026-04-08, MIT 18.06 코스 전체 개요 — 왜 배우는가, 무엇을 다루는가
1.2.1.1 Ch.1 Introduction to Vectors
- 2026-04-06, Ch.1 Overview — 선형결합, 내적, 코사인, 노름 종류
- 2026-04-06, Ch.1 §1.1 — Vectors and Linear Combinations
- 2026-04-08, Ch.1 §1.2 — Lengths and Dot Products
1.2.1.2 Ch.2 Solving Linear Equations
- 2026-04-08, Ch.2 Overview — Row Picture · Column Picture · Ax=b에서 LU 분해까지
- 2026-04-08, Ch.2 §2.1 — Vectors and Linear Equations
- 2026-04-08, Ch.2 §2.2 — The Idea of Elimination
- 2026-04-08, Ch.2 §2.3 — Elimination Using Matrices
- 2026-04-08, Ch.2 §2.4 — Rules for Matrix Operations
- 2026-04-08, Ch.2 §2.6 — Elimination = Factorization: A = LU
- 2026-04-08, Ch.2 §2.7 — Transposes and Permutations
1.2.1.3 Ch.3 Vector Spaces and Subspaces
- 2026-04-09, Ch.3 §3.1 — Spaces of Vectors and Subspaces Overview
- 2026-04-09, Ch.3 §3.1 심화 — Spaces of Vectors (행렬·다항식·함수 공간, 부분공간 교집합·합)
- 2026-04-09, Ch.3 §3.2 — The Nullspace of A: Solving Ax = 0
- 2026-04-09, Ch.3 §3.3 — The Rank and the Row Reduced Form
- 2026-04-09, Ch.3 §3.4 — The Complete Solution to Ax = b
- 2026-04-09, Ch.3 §3.5 — Independence, Basis and Dimension
- 2026-04-09, Ch.3 §3.6 — Dimensions of the Four Subspaces
- 2023-03-30, Special Matrices — 카탈로그 (정사각·대각·대칭·멱등·중심행렬·공분산)
- 2026-04-12, \(X^\top X\) 가 왜 분산인가 — Gram Matrix, Scatter Matrix, 공분산 행렬
1.2.1.4 Ch.4 Orthogonality
- 2026-04-10, Ch.4 Overview — 직교성(Orthogonality) 개요
- 2026-04-10, Ch.4 §4.1 — Orthogonality of the Four Subspaces
- 2026-04-10, Ch.4 §4.2 — Projections (투영)
- 2026-04-10, Ch.4 §4.3 — Least Squares Approximations (최소제곱 근사)
- 2026-04-10, Ch.4 §4.4 — Orthogonal Bases and Gram-Schmidt (정규직교 기저와 그람-슈미트)
1.2.1.5 Ch.5 Determinants
- 2026-04-10, Ch.5 Overview — Determinants (행렬식) 개요
- 2026-04-10, Ch.5 §5.1 — The Properties of Determinants (행렬식의 성질)
- 2026-04-10, Ch.5 §5.2 — Permutations and Cofactors (순열과 여인수)
- 2026-04-10, Ch.5 §5.3 — Cramer’s Rule, Inverses, and Volumes (크래머 공식·역행렬·부피)
1.2.1.6 Ch.6 Eigenvalues and Eigenvectors
- 2026-04-10, Ch.6 Overview — 고유값과 고유벡터: 정의·기하 직관·특성 방정식·ML 응용
- 2026-04-10, Ch.6 §6.2 — 행렬의 대각화: A=SΛS⁻¹ 유도·기저 변환·스펙트럼 분해
- 2026-04-10, Ch.6 §6.3 — 미분방정식에의 응용: du/dt=Au 해법·안정성·행렬 지수
- 2026-04-10, Ch.6 §6.4 — 대칭 행렬: 실수 고유값·직교 고유벡터·스펙트럼 정리 A=QΛQᵀ
- 2026-04-10, Ch.6 §6.5 — 양정치 행렬: 5가지 동치 조건·에너지·이차형식 기하·촐레스키·ML 응용
- 2026-04-10, Ch.6 §6.6 — 닮음 행렬: 기저 변환·닮음 불변량·조르당 표준형·행렬 거듭제곱과 미분방정식 응용
- 2026-04-11, Ch.6 §6.7 — 특이값 분해 (SVD): A=UΣVᵀ 구조·4개 부분공간·저차원 근사·PCA·이미지 압축
1.2.1.7 Ch.7 Linear Transformations
1.2.1.8 Ch.9 Numerical Linear Algebra
- 2026-04-13, Ch.9 Overview — 수치 선형대수 개요: 부동소수점·조건수·직접법·반복법
- 2026-04-13, Ch.9 §9.1 — 실전 가우스 소거법: 부분 피벗팅·PA=LU·연산량·성장 인자·희소 전략
- 2026-04-13, Ch.9 §9.2 — 노름과 조건수: 연산자 노름·Rayleigh 몫·조건수·log κ 자리수 손실
- 2026-04-13, Ch.9 §9.3 — 반복법과 전처리기: 분할·스펙트럼 반경·Jacobi·GS·SOR·ILU·CG·Multigrid
- 2026-04-13, Ch.10 Overview — 복소 벡터와 행렬 개요: Hermitian·Unitary·Fourier 행렬의 지도
- 2026-04-13, Ch.10 §10.1 — 복소수: \(i^2=-1\) 부터 Euler 공식·극형식·1의 n제곱근까지
- 2026-04-13, Ch.10 §10.2 — Hermitian과 Unitary 행렬: 실대칭·직교의 복소 일반화와 스펙트럼 정리
- 2026-04-13, Ch.10 §10.3 — 고속 푸리에 변환: \(F_n\) 재귀 분해·butterfly·bit-reversal·\(O(n\log n)\)
1.2.2 응용/확장 토픽
- 2023-04-02, Matrix Calculus — 행렬·벡터 미분 공식
- 2026-04-11, Singular Value Decomposition (SVD)
- 2026-04-11, Linear Transformations (심화) — 개요 포스트 참조
- 2026-04-12, Ch.8 Applications — 선형대수의 7가지 응용 종합 개요
- 2026-04-12, Ch.8 §8.1 Matrices in Engineering — 강성행렬 \(K = A^\top C A\) 와 차분-물성-균형
- 2026-04-12, Ch.8 §8.2 Graphs and Networks — 접속행렬·키르히호프 법칙·그래프 라플라시안
- 2026-04-12, Ch.8 §8.3 Markov Matrices, Population, and Economics — Perron-Frobenius·Leslie·Leontief
- 2026-04-12, Ch.8 §8.4 Linear Programming — 부등식·최소화가 선형대수를 만났을 때
- 2026-04-12, Ch.8 §8.5 Fourier Series — 함수 공간에서의 선형대수
- 2026-04-12, Ch.8 §8.6 Linear Algebra for Statistics and Probability — 가중 최소제곱·공분산·PCA
- 2026-04-12, Ch.8 §8.7 Computer Graphics — 동차 좌표와 4×4 행렬의 세계
1.3 Graph Theory
- 2026-03-24, 그래프 이론 기초
- 1111-11-11, 그래프 알고리즘 심화 (SCC, 위상 정렬, 최소 신장 트리)
- 1111-11-11, 그래프 임베딩 (Node2Vec, GNN)
1.4 Optimization
- 2023-03-23, Minimizer & Minimum
- 1111-11-11, Convex Set
- 1111-11-11, Convex Function
- 1111-11-11, Unconstrained Optimization
- 1111-11-11, Non-linear Least Square
- 1111-11-11, Largrange Multiplier Method
- 1111-11-11, Largrange Primal Function
- 1111-11-11, Largrange Dual Function
- 1111-11-11, KKT conditions
- 1111-11-11, Gradient Descent Optimizers
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