Posted by haifeng on 2020-12-28 23:25:55 last update 2021-03-22 16:54:36 | Answers (1) | 收藏
>> 2+(0-1)
in> 2+(0-1)
out> (2+-1)
------------------------
已解决
>> sum(1/sqrt(n),n,1,3)
in> sum(1/sqrt(n),n,1,3)
out> sqrt/1+sqrt/2+sqrt/3+0
------------------------
[BUG]
>> 2.71828183^2.3025
in> 2.71828183^2.3025
out> 2.1100000000
------------------------
>> ln(65)
in> ln(65)
out> 138.31776583
------------------------
Posted by haifeng on 2020-12-27 22:35:52 last update 2020-12-27 22:37:02 | Answers (0) | 收藏
（以下使用 Calculator 进行计算）
>> ((H*a/p+p/y)*N/e-w)/y*e+a/r
in> ((H*a/p+p/y)*N/e-w)/y*e+a/r
out> (r*e*(N*(H*a*y+p*p)-p*y*e*w)+p*y*e*y*a)|p*y*e*y*r
------------------------
>> :expand=on
Expand on. In fraction calculation mode,
e.g., (a+b)*(c+d) will return a*c+a*d+b*c+b*d.
>> ((H*a/p+p/y)*N/e-w)/y*e+a/r
in> ((H*a/p+p/y)*N/e-w)/y*e+a/r
out> (r*e*(N*(H*a*y+p*p)-p*y*e*w)+p*y*e*y*a)|p*y*e*y*r
==> r*e*N*H*a*y+r*e*N*p*p-r*e*p*y*e*w+p*y*e*y*a|p*y*e*y*r
------------------------
Posted by haifeng on 2020-12-26 11:34:10 last update 2021-01-04 15:43:07 | Answers (0) | 收藏
| 软件名称 | 官方网址 | 开发者 | 免费软件/商业软件 | 备注 |
|---|---|---|---|---|
| Mathematica | https://www.wolfram.com/mathematica/ | Wolfram | 商业软件 | |
| Maple | https://maplesoft.com/products/Maple/ | Maplesoft | 商业软件 | |
| Matlab | https://www.mathworks.com/products/matlab.html | MathWorks | 商业软件 | |
| PARI/GP | http://pari.math.u-bordeaux.fr/ |
the Laboratoire A2X (Universite Bordeaux 1, France) |
||
| MMP | http://www.mmrc.iss.ac.cn/mmp/index.htm | 中科院 | 免费软件/闭源 | |
| Python | https://www.python.org/ | 免费软件/开源 | 需安装符号计算模块 sympy | |
| GAP | https://www.gap-system.org/ | 免费软件/开源 | ||
| Magma | http://magma.maths.usyd.edu.au/magma/ | 悉尼大学 | non-commercial system | |
| Maxima | https://maxima.sourceforge.io/ | 免费/开源 | ||
| maTHμ | https://github.com/maTHmU | 清华大学 | 清华大学本科生开发 |
数值计算软件
| 软件或库名称 | 官方网址 | |||
|---|---|---|---|---|
| Matlab | https://www.mathworks.com/products/matlab.html | |||
| Scilab | ||||
| Octave | ||||
| Math.NET Numerics | https://numerics.mathdotnet.com/ |