josdejong/mathjs

digamma function with complex argument

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#2,361 opened on Dec 14, 2021

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 (9 comments) (0 reactions) (0 assignees)JavaScript (1,314 forks)batch import
featurehelp wanted

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Description

I would need an approximation in terms of elementary functions for digamma(x + i y), x>1/2, smoothly interpolating between small and large |y|

Contributor guide

Research direction
Study the existing digamma implementation in mathjs. Research the digamma function with complex arguments and suitable approximation formulas. Consider implementing using series expansion or asymptotic expansion.
Tech stack
javascript
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
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.
40