\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.8 - 2D and 3D Linear Geometry Kernel

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Kernel::ComputeA_3 Concept Reference
Kernel Function Object Concepts

## Definition

Refines:
  `AdaptableFunctor`

## Operations
A model of this concept must provide:
Kernel::FT | operator() (const Kernel::Line_3 &l) const
| returns the coefficient `a` of the line with equation `ax +by + cz+ d = 0`.