= Frédéric Haglund
{c}
<Frédéric Haglund> works on <geometric group theory> and cubical geometry. His joint work with <Daniel T. Wise> introduced <special cube complexes> and related them to <Right-angled Artin groups>.<Special cube complexes by Frédéric Haglund and Daniel T. Wise>[Original byline and introduction]{ref}
The key conditions control how hyperplanes embed, whether they are two-sided and how they meet. A local isometry to a standard cubical model then yields an embedding of the <fundamental group>. This is a concrete mechanism for obtaining algebraic information from the internal geometry of a complex.<Special cube complexes by Frédéric Haglund and Daniel T. Wise>[Theorem 1.1 and definition of specialness]{ref}
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