Recognition of finite exceptional groups of Lie type

preprint2014arXivOpen access

Abstract

Let qq be a prime power and let GG be an absolutely irreducible subgroup of GLd(F)GL_d(F), where FF is a finite field of the same characteristic as $\F_q$, the field of qq elements. Assume that G≅G(q)G \cong G(q), a quasisimple group of exceptional Lie type over $\F_q$ which is neither a Suzuki nor a Ree group. We present a Las Vegas algorithm that constructs an isomorphism from GG to the standard copy of G(q)G(q). If G≇3D4(q)G \not\cong {}^3 D_4(q) with qq even, then the algorithm runs in polynomial time, subject to the existence of a discrete log oracle.

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