We present a numerical code for the computation of nodes and weights of a low-cardinality positive quadrature formula on spherical triangles, nearly exact for polynomials of a given degree. The algorithm is based on subperiodic trigonometric Gaussian quadrature for planar elliptical sectors and on Caratheodory–Tchakaloff quadrature compression via NNLS.

中文翻译：

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球面三角形上的近代数Tchakaloff样求积

我们提供了一个数值代码，用于计算球面三角形上的低基数正整数公式的节点和权重，对于给定阶数的多项式几乎是精确的。该算法基于平面椭圆扇形的次周期三角高斯正交和基于NNLS的Caratheodory-Tchakaloff正交压缩。