Geodesic
Characteristic numbers in $U$-theory
Izvestiya. Mathematics, Tome 5 (1971) no. 6, pp. 1365-1385 
N. V. Panov. Characteristic numbers in $U$-theory. Izvestiya. Mathematics, Tome 5 (1971) no. 6, pp. 1365-1385. http://geodesic.mathdoc.fr/item/IM2_1971_5_6_a8/
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     author = {N. V. Panov},
     title = {Characteristic numbers in $U$-theory},
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     volume = {5},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_6_a8/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

We compute the subgroup of $\Omega_*^U\otimes Q$ consisting of all elements with integral $U$-numbers. Using these results, we obtain a new computation of the group $\mathrm{Ext}^1_{A^U}(\Omega_*^U,\Omega_*^U)$ and a complete answer to the question of Chern numbers of $(U,\mathrm{fr})$-manifolds.

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