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[Linear algebra] 24-24b. Markov matrices; fourier series

*24b강은 퀴즈 해설 강의로 제외함 Lecture https://ocw.mit.edu/courses/18-06-linear-algebra-spring-2010/resources/lecture-24-markov-matrices-fourier-series/ Lecture 24: Markov matrices; fourier series | Linear Algebra | Mathematics | MIT OpenCourseWare MIT OpenCourseWare is a web based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity ocw.m..

sudo apt-get update 시 ppa repository로 인한 error 해결법

ubuntu에서 심심치 않게 새로운 설치를 하게 될 때 사용하는 명령어가 sudo apt-get udpate 다. 웬만하면 1~3초 내에 끝나는 작업인데 가끔 요상한 에러를 보이면서 멈출 때가 있다. 대표적 원인 중 하나인 ppa 관련 에러의 해결법을 정리하고자 한다. Err:22 http://ppa.launchpad.net/bzindovic/suitesparse-bugfix-1319687/ubuntu focal Release 404 Not Found [IP: 185.125.190.52 80] Err:21 https://apt.kitware.com/ubuntu focal InRelease The following signatures couldn't be verified because the public ..

Trouble/Linux 2023.01.30

[Linear algebra] 20. Cramer's rule, inverse matrix, and volume

Lecture https://ocw.mit.edu/courses/18-06-linear-algebra-spring-2010/resources/lecture-20-cramers-rule-inverse-matrix-and-volume/ Lecture 20: Cramer's rule, inverse matrix, and volume | Linear Algebra | Mathematics | MIT OpenCourseWare MIT OpenCourseWare is a web based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity ocw.mit...