Resolution of Singularities of Quasitoric Orbifolds and Equivariant Cobordism of Certain T-manifolds

Koushik Brahma , Soumen Sarkar , Subhankar Sau

Chinese Annals of Mathematics, Series B ›› 2026, Vol. 47 ›› Issue (5) : 855 -870.

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Chinese Annals of Mathematics, Series B ›› 2026, Vol. 47 ›› Issue (5) :855 -870. DOI: 10.1007/s11401-026-0038-3
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Resolution of Singularities of Quasitoric Orbifolds and Equivariant Cobordism of Certain T-manifolds
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Abstract

Quasitoric orbifolds and locally 1-standard T-manifolds are the topological generalizations of simplicial projective toric varieties and good contact toric manifolds respectively. In this paper, the authors show that there is a resolution of singularities of a quasitoric orbifold. Then, they give an explicit construction of a (2n + 1)-dimensional smooth orientable manifold with Tn+1-action whose boundary is a given locally 1-standard T-manifold. Moreover, they conclude that good contact toric manifolds and generalized lens spaces are equivariantly cobordant to zero.

Keywords

Resolution of singularity / Quasitoric orbifold / Torus action / Locally 1-standard T-manifold / Equivariant cobordism / 14E15 / 57R85 / 52B11 / 57S12

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Koushik Brahma, Soumen Sarkar, Subhankar Sau. Resolution of Singularities of Quasitoric Orbifolds and Equivariant Cobordism of Certain T-manifolds. Chinese Annals of Mathematics, Series B, 2026, 47 (5) : 855-870 DOI:10.1007/s11401-026-0038-3

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