Content 目录
https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1007448#sec001
https://feyncalc.github.io/Tools and Tables for Quantum Field Theory Calculations
https://library.wolfram.com/infocenter/ID/8848/
https://library.wolfram.com/infocenter/MathSource/8329/
https://library.wolfram.com/infocenter/BySubject/Science/Physics/Relativity?page=1
https://josmar493.dreamhosters.com/
https://tex.stackexchange.com/questions/99124/how-to-draw-penrose-diagrams-with-tikz
https://texample.net/spacetime/
https://zhuanlan.zhihu.com/p/346370129
https://pennylane.ai/qml/demonstrations
https://www.tensors.net/ 张量网络入门
Find extremals of a list/table 寻找一个list或者table的极值点/极值
按照{x_1,x_2}的第二个元素从小到大排序
Input: Sort[{{a, 2}, {c, 1}, {d, 3}}, #1[[2]] < #2[[2]] &]
Output: {{c, 1}, {a, 2}, {d, 3}}
Input: listmi = Table[{t, pdeSolnL2}, {t, 0, 2000, 100}]
{{0, 0.}, {100, 4.19199*10^-9}, {200, 1.55067*10^-6}, {300,
9.49167*10^-6}, {400, 0.0000208475}, {500, 0.0000311942}, {600,
0.0000391877}, {700, 0.0000449636}, {800, 0.0000490262}, {900,
0.0000518596}, {1000, 0.0000538239}, {1100, 0.0000551772}, {1200,
0.0000560933}, {1300, 0.0000566587}, {1400, 0.0000570167}, {1500,
0.0000571755}, {1600, 0.0000572371}, {1700, 0.0000571868}, {1800,
0.0000570839}, {1900, 0.0000569266}, {2000, 0.0000567222}}
Input: Sort[listmi, #1[[2]] > #2[[2]] &]
{{1600, 0.0000572371}, {1700, 0.0000571868}, {1500,
0.0000571755}, {1800, 0.0000570839}, {1400, 0.0000570167}, {1900,
0.0000569266}, {2000, 0.0000567222}, {1300, 0.0000566587}, {1200,
0.0000560933}, {1100, 0.0000551772}, {1000, 0.0000538239}, {900,
0.0000518596}, {800, 0.0000490262}, {700, 0.0000449636}, {600,
0.0000391877}, {500, 0.0000311942}, {400, 0.0000208475}, {300,
9.49167*10^-6}, {200, 1.55067*10^-6}, {100, 4.19199*10^-9}, {0, 0.}}