question Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to ta...

paper core

Pressure to the surface to a stream notation \(\varpi\): -> r ///////p439 (22) \(\sigma\): -> \(\omega\) \(c\): -> \...

wave patterns 📄P411, Sec 12.4 For a point source \(P\), the characteristics carrying disturbances pass through \(P\) and we...

1-dimensional Gaussian integral \[ \begin{gathered} \int_{-\infty}^{\infty} e^{-x^2} d x=\sqrt{\pi} \\ \int_{-\infty}^{\infty...

原想写一些剖析自我的文字，却不知如何下笔，也罢，就写写最近的杂绪吧。 早春，院子里的不知名的树依然光秃着树干，纹丝不动地点缀着视野里的红墙，肃杀而冷淡。又是一个冬去了，除却偶或光临的故乡的喜鹊，在小院凌乱的大戏台，唱着故园情、天涯愁。素常，小院是安静...