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furka

furka is a modular Python library for locating chemical transition states (first-order saddle points) and minimum energy paths (MEPs) on molecular potential energy surfaces.

Named after the Swiss Alpine Furka Pass (a saddle connecting two valleys) and Latin furca (a two-pronged bracket), furka decouples double-ended path/bracket generation (Stage 1) from local saddle-point refinement (Stage 2) and post-TS MEP/IRC verification (Stage 3).

Status: Early alpha (0.0.1a1). Full release accompanying upcoming publication.

Installation

pip install furka

Quick Example

import numpy as np
from furka import kabsch_rmsd

coords_a = np.array([[0.0, 0.0, 0.0], [0.0, 0.0, 1.15], [0.0, 1.0, -0.4]])
coords_b = coords_a + np.array([2.5, -1.0, 0.5])  # rigid translation

rmsd = kabsch_rmsd(coords_a, coords_b)  # 0.0

Development

uv sync
uv run pytest
uv run ruff check
uv run mypy src tests

License

MIT License — see LICENSE.

Metadata

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