Geodesic
The Lefschetz number of an involution on the space of classes of positive definite quadratic forms.
Commentarii mathematici Helvetici, Tome 56 (1981), pp. 272-296

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Mots-clés : Euler-Poincare characteristic, fixpoint formula, quadratic forms, cohomology, symmetric space, singular cohomology, full congruence subgroup, explicit formula for Lefschetz number, fixpoint set of involution, noncommutative cohomology set, involution 
J. Rohlfs. The Lefschetz number of an involution on the space of classes of positive definite quadratic forms.. Commentarii mathematici Helvetici, Tome 56 (1981), pp. 272-296. http://geodesic.mathdoc.fr/item/CMH_1981__56_139870/
@article{CMH_1981__56_139870,
     author = {J. Rohlfs},
     title = {The {Lefschetz} number of an involution on the space of classes of positive definite quadratic forms.},
     journal = {Commentarii mathematici Helvetici},
     pages = {272--296},
     year = {1981},
     volume = {56},
     zbl = {0474.10019},
     url = {http://geodesic.mathdoc.fr/item/CMH_1981__56_139870/}
}
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