scholarly journals Immersions and embeddings of quasitoric manifolds over the cube

2014 ◽  
Vol 95 (109) ◽  
pp. 63-71 ◽  
Author(s):  
Djordje Baralic

A quasitoric manifold M2n over the cube In is studied. The Stiefel-Whitney classes are calculated and used as the obstructions for immersions, embeddings and totally skew embeddings. The manifold M2n, when n is a power of 2, has interesting properties: imm(M2n) = 4n ? 2, em(M2n) = 4n ? 1 and N(M2n)? 8n?3.

2018 ◽  
Vol 122 (2) ◽  
pp. 179
Author(s):  
Vassilis Metaftsis ◽  
Stratos Prassidis

Quasitoric manifolds are manifolds that admit an action of the torus that is locally the same as the standard action of $T^n$ on $\mathbb{C}^n$. It is known that the quotients of such actions are nice manifolds with corners. We prove that a class of locally standard manifolds, that contains the quasitoric manifolds, is equivariantly rigid, i.e., that any manifold that is $T^n$-homotopy equivalent to a quasitoric manifold is $T^n$-homeomorphic to it.


2019 ◽  
Vol 69 (2) ◽  
pp. 437-448
Author(s):  
Suyoung Choi ◽  
Kyoungsuk Park

Abstract A simple polytope P is said to be B-rigid if its combinatorial structure is characterized by its Tor-algebra, and is said to be C-rigid if its combinatorial structure is characterized by the cohomology ring of a quasitoric manifold over P. It is known that a B-rigid simple polytope is C-rigid. In this paper, we show that the B-rigidity is not equivalent to the C-rigidity.


2016 ◽  
Vol 27 (04) ◽  
pp. 1650032 ◽  
Author(s):  
Suyoung Choi ◽  
Seonjeong Park

Let [Formula: see text] be the Whitney sum of complex line bundles over a topological space [Formula: see text]. Then, the projectivization [Formula: see text] of [Formula: see text] is called a projective bundle over [Formula: see text]. If [Formula: see text] is a nonsingular complete toric variety, then so is [Formula: see text]. In this paper, we show that the cohomology ring of a nonsingular projective toric variety [Formula: see text] determines whether it admits a projective bundle structure over a nonsingular complete toric surface. In addition, we show that two [Formula: see text]-dimensional projective bundles over [Formula: see text]-dimensional quasitoric manifolds are diffeomorphic if their cohomology rings are isomorphic as graded rings. Furthermore, we study the smooth classification of higher dimensional projective bundles over [Formula: see text]-dimensional quasitoric manifolds.


Author(s):  
Suyoung Choi ◽  
Seonjeong Park

Every cohomology ring isomorphism between two non-singular complete toric varieties (respectively, two quasitoric manifolds), with second Betti number 2, is realizable by a diffeomorphism (respectively, homeomorphism).


2008 ◽  
Vol 199 (8) ◽  
pp. 1201-1223 ◽  
Author(s):  
M Masuda ◽  
T E Panov

2015 ◽  
Vol 288 (1) ◽  
pp. 10-28
Author(s):  
Anton A. Ayzenberg ◽  
Mikiya Masuda ◽  
Seonjeong Park ◽  
Haozhi Zeng
Keyword(s):  

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