scholarly journals The motivic nearby fiber and degeneration of stable rationality

2019 ◽  
Vol 217 (2) ◽  
pp. 377-413
Author(s):  
Johannes Nicaise ◽  
Evgeny Shinder
Keyword(s):  
2000 ◽  
Vol 55 (1) ◽  
pp. 178-179 ◽  
Author(s):  
Vsevolod E Kordonskii
Keyword(s):  

2015 ◽  
Vol 365 (3-4) ◽  
pp. 1201-1217 ◽  
Author(s):  
Brendan Hassett ◽  
Andrew Kresch ◽  
Yuri Tschinkel

2018 ◽  
Vol 2020 (23) ◽  
pp. 9075-9119 ◽  
Author(s):  
Igor Krylov ◽  
Takuzo Okada

Abstract The main aim of this article is to show that a very general three-dimensional del Pezzo fibration of degrees 1, 2, and 3 is not stably rational except for a del Pezzo fibration of degree 3 belonging to explicitly described two families. Higher-dimensional generalizations are also discussed and we prove that a very general del Pezzo fibration of degrees 1, 2, and 3 defined over the projective space is not stably rational provided that the anti-canonical divisor is not ample.


2003 ◽  
Vol 269 (2) ◽  
pp. 373-380 ◽  
Author(s):  
Esther Beneish
Keyword(s):  

2018 ◽  
Vol 28 (1) ◽  
pp. 99-138 ◽  
Author(s):  
Takuzo Okada
Keyword(s):  

1999 ◽  
Vol 10 (05) ◽  
pp. 643-665
Author(s):  
NGUYÊÑ QUÔĆ THǍŃG

We prove the stable rationality of almost simple adjoint algebraic groups, the connected components of the Dynkin diagram of anisotropic kernel of which contain at most two vertices. The (stable) rationality of many isotropic almost simple groups with small anisotropic kernel and some related results in weak approximation over arbitrary fields are discussed.


1991 ◽  
Vol 104 (1) ◽  
pp. 179-199 ◽  
Author(s):  
Christine Bessenrodt ◽  
Lieven Le Bruyn
Keyword(s):  

2019 ◽  
Vol 2019 (751) ◽  
pp. 275-287 ◽  
Author(s):  
Brendan Hassett ◽  
Yuri Tschinkel

AbstractWe prove that very general non-rational Fano threefolds which are not birational to cubic threefolds are not stably rational.


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