josdejong/mathjs

Simplify fraction in derivative

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#2,055 opened on Dec 11, 2020

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 (3 comments) (1 reaction) (0 assignees)JavaScript (1,314 forks)batch import
featurehelp wanted

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Description

Hello,

The work done here is really great. May be you can help me with two issues.

math.derivative('sqrt(6x)','x').toTex() // "\\frac{6}{2\\cdot\\sqrt{6~ x}}"

How can I have "\frac{3}{\sqrt{6x}}" ?

math.simplify('4x^2+-2x+-6').toTex() // "4~{ x}^{2}-2\\cdot x+-6"

How can I have "4x^2-2x-6" ?

Sometime polynoms are not properly ordered. math.simplify('4x^2+2x-6').toTex() // 4~{ x}^{2}-6+2~ x"

Thanks

Contributor guide

Research direction
Investigate the derivative and simplify functions in mathjs to handle fractional simplification and polynomial ordering. Look at the simplification rules in the source code for toTex methods.
Tech stack
javascript
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70