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Add Boys function utility for 2-electron integral evaluation#248

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FriedIce-623 wants to merge 1 commit intotheochem:masterfrom
FriedIce-623:feature/boys-function-utility
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Add Boys function utility for 2-electron integral evaluation#248
FriedIce-623 wants to merge 1 commit intotheochem:masterfrom
FriedIce-623:feature/boys-function-utility

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@FriedIce-623
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@FriedIce-623 FriedIce-623 commented Mar 15, 2026

Adds a standalone boys.py module implementing the Boys function F_m(x),
which is the core auxiliary function needed for the Obara-Saika and
Head-Gordon-Pople recurrence relations for 2-electron integrals.

Checklist

  • Write a good description of what the PR does.
  • Add tests for each unit of code added (e.g. function, class)
  • Update documentation
  • Squash commits that can be grouped together
  • Rebase onto master

Type of Changes

Type
✨ New feature
📜 Docs

Related

F_m(x) is the core auxiliary function in the Obara-Saika and
Head-Gordon-Pople recurrence relations. Includes array support,
asymptotic formula for large x, and tests.
@marco-2023
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Thanks @FriedIce-623 for the suggestion. This functionality was already implemented in PR #245, so I’m closing this issue.

@marco-2023 marco-2023 closed this Mar 16, 2026
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