Minimality of the Well-rounded Retract
نویسندگان
چکیده
We prove that the well-rounded retract of SOn \ SLn R is a minimal SLn Z-invariant spine.
منابع مشابه
Cohomology at Infinity and the Well-rounded Retract for General Linear Groups
(0.1). Let G be a reductive algebraic group defined over Q, and let Γ be an arithmetic subgroup of G(Q). Let X be the symmetric space for G(R), and assume X is contractible. Then the cohomology (mod torsion) of the space X/Γ is the same as the cohomology of Γ. In turn, X/Γ will have the same cohomology as W/Γ, if W is a “spine” in X . This means thatW (if it exists) is a deformation retract ofX...
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