Rebuilding #SymPy ‘s internals from the ground up, towards a faster and more flexible implementation https://oscarbenjamin.github.io/blog/czi/post1.html

New #Blog #Post:
Solving #complex #numbers #exercises using #Python and #Sympy:

https://lgrando1.github.io/post/complex3/

@trefle
Toute ma symp-athie, mais connais tu #sympy ?
Bon ça résout pas tout bien sûr, mais ça aide.

@jakob_thoboell @eliasp MetPy ist umfangreich, hat aber einen etwas anderen Fokus (z.B. Gitterdaten, weniger Zeitserienanalyse), siehe hier: https://tue-umphy.gitlab.io/software/parmesan/#why-not-metpy

Mit PARMESAN habe ich versucht, mehr(ere) Sicherheiten in der Physik (Wertebereich-&Einheitencheck) und Mathematik (#SymPy Formeln) und mehr Flexibilität einzubauen (weniger hard-coding). Am Ende ist es eine Kollektion von meteorologischen Funktionen, die ich/wir oft benötigen.

@eliasp @WolfgangFeist @isotopp

Dazu habe ich das #Python-Paket PARMESAN für unsere Arbeitsgruppe @umphy gemacht:

https://gitlab.com/tue-umphy/software/parmesan

Hier die Doku der Feuchtigkeits-Funktionen:

https://tue-umphy.gitlab.io/software/parmesan/api/parmesan.gas.humidity.html

Ich habe das Paket grade deutlich aufgebohrt, sodass viele der Gleichungen samt Doku dank #SymPy autogeneriert werden. Ich reiche bald einen Artikel dazu bei @joss ein. 🥳

Posting my recipes for using external libraries in Python for #Quarto . The #SymPy #Python library makes it easy to document computations for teaching and research.

Duas novas postagens no lgrando1.github.io sobre números complexos, utilizando #Python e sua biblioteca #Sympy para efetuar as operações matemáticas.
Pt.1: Introdução e Representação Cartesiana e operações básicas:
https://lgrando1.github.io/post/complex1/
Pt.2: Forma Polar, exponenciais, raízes, funções complexas e Cauchy-Riemann:
https://lgrando1.github.io/post/complexex1/
Os códigos destas postagens podem ser encontrados aqui:
https://github.com/lgrando1/Notas_Numeros_Complexos/
Fico à disposição para sugestões, dúvidas.
#complex #numbers #math #theory

😂 Here I am, entering an equation for the Monin-Obukov length (a turbulence parameter) into #SymPy, and SymPy is like: No! 😂

WTF is happening here? Vars are just symbols with positive=True and real=True, except for L_MO and F_H which have positive=False.

Interestingly, if I constrain F_H to positive, the equation stays an equation and is not just False. 🤔

EDIT: Aaah, positive=False means *negative* 🤦 SymPy did its job! 👍 Describing problems helps! 😃

#Math #Physics #Meteorology #Python

@nobodyinperson Also just found this mention of #sympy in @pythonbytes with @allendowney : https://talkpython.fm/episodes/show/423/solving-10-different-simulation-problems-with-python 👈🏻 scroll to about 50 minutes in to hear about using SymPy when modelling glucose / insulin levels.

I like what Allen says about SymPy helping to separate the symbolic expression of the system from "The grind". This is what we’ve found, but with our financial model.

Holy sh*t, #sympy is such a crazy powerful package, look how much you can get out of a single one-line expression and some fancy decorators and wrappers.

This is from the development of PARMESAN, a #Python package for meteorological/turbulence/timeseries analysis I'm working on @umphy and that I plan to submit to @joss in near future.

It seems I'm having ALOT of fun writing financial contract rules into #sympy 😊

Even _just_ being able to render reasonable versions of these financial clauses is already a great help - I don't know why I didn't do this years ago.

https://docs.sympy.org/latest/tutorials/intro-tutorial/printing.html

@sagemath #sagemath, #opensource, #magma, #mathematic, #matlab, #numpy, #scipy, #matplotlib, #sympy, #maxima, #gap, #flint, #r, #python

Question for anyone who's an engineer, a mathematician, or a software developer: do you ever use tools like #mathematica, #sympy, or other computer algebra systems?

#SymPy is pretty damn cool for doing equations in #python, definitely gotta use it more

In a productive coding-on-the-train session I wrote a #Python-only renderer for SDFs (signed distance functions). SDFs are defined with #SymPy which brings the immense advantage of having it derive an analytical solution for the surface normals needed for shading.

What you see below is a first result of a rendered sphere pierced by three infinite cylinders of different diameters.

Code dump is here: https://gitlab.com/nobodyinperson/sdf-experiments/-/blob/main/SympySDF.ipynb

#3DModelling #3d #render

Btw it is done with #sympy

#SymPy is a crazy good #Python package! 🤯

There's even a #WolframAlpha-like website #SymPyGamma 😂: https://sympygamma.com/

Here is a super quick example of having it generate a usable Python function for maximum error estimation 😲

#CAS #Calculus

@sp_monte_carlo, here's an old, unfinished manuscript from nearly 10 years ago that demonstrates some of the computational work for marginalized Horseshoe (and other polynomial tail) priors in #sympy: https://tinyurl.com/hs-marginals. It uses a generalized G/H-function framework to cover entire classes of priors. Since there are broad theorems for producing asymptotic series of these special functions, it can work out pretty nicely.

春江晴空
2023-01-09 https://weibo.com/6974466537/MnsmEFmHL

因为[2]中提到的行动(图2），我们治疗时的两种不可替代的药物，#雌二醇 和#醋酸环丙孕酮 全部下架。特别是醋酸环饼运彤，在#北京 可以在#北医三院 配到的，但其他城市都要到#省会 才能配到。医院也说是不进货，配完为止
药物关芳的代理商，因为政策原因，无法代理这个药品（图3）。国内的生产厂家，由于经济原因可能会很快停产（图4）
一旦突然停药，会导致内分泌极度失调，造成严重反应，会引起死亡。以我们之前的数据，这样的死亡率是1/5
同时，在几天内经历整个#更年期，还叠加和#产后抑郁 加强版，精神原因的#死亡率 和身体原因的死亡率可能差不多
从12月20日至今，我所知道的人中已经有17人因此去世
所引用文件[1]和上一版唯一的改动是，限制了磁二纯和醋酸环饼运彤；虽然说是线上，但12月初线尚、#医院 同步下架。我们发现#比卡鲁安 能够缓解突然停药造成的死亡后，在没有发任何公示的情况下，突然禁止了笔卡鲁安的销售，包括医院内
我们自己有一些储备，互相借来借去，暂时还能维持，但维持不了多久。到2月我们互相借不到的时候，会有五分之一因为身体问题去世，五分之一因为生理性精神状况去世，2/5的死亡率
我们并不是社会的蛀虫。
高中#教育部 办理的选拔国家队的五大竞赛，我们以十万分之一的出生率，每三年总会有一两个同类进入只有4人的国家队，代表中国参加全球总决赛
科研领域，#量子计算 的#纠缠研究 一部分世界顶端是一个同类在国内做的
在生产领域，#开源 全国产#操作系统，世界承认、集成进微软Windows WSL的，只有#AOSC [3]，它几乎是一个同类以一己之力创立，并且主要的一些维护者也都是同类
我自己也代表国家打破过世界纪录，也是#numpy，#sympy 工程的成员：我们很快都会面对相同的情况，我们会有40%的人去世。普通人会更难，死亡率会更高。
哪怕犯了再大的错误，也不应该是这种惩罚吧
我们只是想好好地活……
我只想在一个安静的角落研究#解析数论 和#序数分析……
虽然湖面结冰了，但春天总会来的吧……求看到这个的同类努力活下去☀️……求大家帮助转发🙏……

#trans #跨性别 #humanrights

Advent of Code Day 21 — Monkey Math

Hey, monkeys again! Shouting! Luckily, we have an elephant to interpret. I feel... morally uneasy about today's solution.

https://chasingdings.com/2022/12/21/advent-of-code-day-21-monkey-math/

#AdventofCode #elephant #monkey #python #sympy