FXrays

1.3.6 verified Fri May 01 auth: no python

Computes extremal rays with filtering for 3-manifolds. Supports Python >=3.7. Current version: 1.3.6 (released 2025). Maintenance-mode releases with no user-facing changes.

pip install fxrays

Common errors

error ModuleNotFoundError: No module named 'fxrays' ↓

cause Library not installed or imported incorrectly.

fix

Run: pip install fxrays

error AttributeError: module 'fxrays' has no attribute 'fxrays' ↓

cause Wrong import path. The class is FXrays with capital letters.

fix

Use: from fxrays import FXrays

Warnings

gotcha The function compute_extremal_rays expects a 2D numpy array with shape (n_points, n_dims). Passing a list of lists may cause unexpected behavior. ↓

fix Convert input to numpy array: np.array(points)

gotcha The class name is FXrays (capital F, capital X). Importing as fxrays.FXrays is correct, not fxrays.FXRays or fxrays.fxrays. ↓

fix Use exactly: from fxrays import FXrays

deprecated Python 3.6 and below are not supported. The package requires Python >=3.7. ↓

fix Upgrade Python to 3.7 or later.

Imports

FXrays
```
from fxrays import FXrays
```
Capitalization matters

compute_extremal_rays

from fxrays import compute_extremal_rays

Primary function

Quickstart

Basic usage to compute extremal rays from a set of points.

from fxrays import compute_extremal_rays
import numpy as np

# Generate random points (example usage)
points = np.random.rand(10, 3)
rays = compute_extremal_rays(points)
print(rays)