비전공자의 인공지능 고군분투기

안녕하세요,오늘은 MIT Gilbert Strang교수님의 Linear algebra 6강 Column Space and Nullspace에 대해 리뷰해보도록 하겠습니다.   Vector SpaceA vector space is a collection of vectors which is closed under linear combinations. In other words, for any two vectors v and w in the space and any two real numbers c and d, the vector cv + dw is also in the vector space. A subspace is a vector space contained inside a vector space. Ve..

안녕하세요, 오늘은 MT Gilbert Strang 교수님의 Linear Algebra 수업 Lecture4, Factorization into A = LU 에 대해 다루어보겠습니다.      Inverse of a productThe inverse of a matrix product AB is B−1 A−1. AB의 역행렬은 B−1 A−1이다.  Transpose of a product행과 열을 바꿀 때 사용the entry in row i column j of A is the entry in row j column i of A^T열I와 행J의 A를 열J와 행I으로 바꾼 것을 A^T라고 한다. The transpose of a matrix product AB is BTAT. For any invert..

안녕하세요, 인공지능 전공자라면 정말 중요하지만 어렵게 느끼는 선형대수학 입니다. 오늘은 MIT GilbertStrang 교수님의 2강인 An Overview of Linear Algebra 에 대해 리뷰해보겠습니다.   This is an overview of linear algebra given at the start of a course on the math­ ematics of engineering.  VectorsWhat do we do with vectors? Take combinationsWe can multiply vectors by scalars(such as under x1,x2,x3), add, and subtract. Given vectors u, vand w we can form ..