feat: add constants/float16/fourth-root-eps

[hrshya]

Resolves none .

Description

What is the purpose of this pull request?

This pull request:

• adds constants/float16/fourth-root-eps .

Related Issues

Does this pull request have any related issues?

This pull request:

• resolve no related issue.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

---

@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
constants/float16/fourth-root-eps	$\color{green}53/53$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}0/0$ $\color{green}+100.00\%$	$\color{green}53/53$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.

[kgryte]

@hrshya How did you calculate the value of this constant to ensure it is correctly rounded for half-precision?

[hrshya]

@hrshya How did you calculate the value of this constant to ensure it is correctly rounded for half-precision?

@kgryte I went through this wiki ( https://en.wikipedia.org/wiki/Half-precision_floating-point_format ) and calculated the value of fourth root of 1/2^10 because half precision have 10 fraction bit and arrived at this value 0.1767766952966369 .