Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Ng TR"'
Autor:
L��, C��ng-Tr��nh
In this paper we prove that the gradient ideal of a Morse polynomial is radical. This gives a generic class of polynomials whose gradient ideals are radical. As a consequence we reclaim a previous result that the unconstrained polynomial optimization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::baead4dbcaf25e3da79724c079eabc9a
Autor:
L��, C��ng-Tr��nh, Du, Thi-Hoa-Binh
In this paper we give a matrix version of Handelman's Positivstellensatz [1], representing polynomial matrices which are positive definite on convex, compact polyhedra. Moreover, we propose also a procedure to find such a representation. As a corolla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18fa8b916df1cffab05aa415643fd1a3
Autor:
L��, C��ng-Tr��nh, Pham, Tien-Son
In this paper, we establish the following version at infinity of Whitney's theorem [6, 7]: Geometric and algebraic tangent cones at infinity of complex algebraic varieties coincide. The proof of this fact is based on a geometric characterization of g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0abf163f159f5733444fce670e7ea86
Autor:
Hamm, Helmut A., L��, D��ng Tr��ng
We study analogues of the usual Picard group for smooth analytic or non-singular algebraic varieties but instead of line bundles we study line bundles with a connection. We choose an approach which works for both cases.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b44cf760c6448c07c8b6c40ca8143c47
Autor:
Ho��ng, ���c, ���m, ���nh Ph, Durand, Jean-Dominique, ���n, Ng��n Tr ���ng Tr, Phan, Ph��c ����nh
Tor sinensis Wu 1977 Specimens Examined: upper Ea Krong No drainage: upper Mekong basin in montane evergreen forest in Bidoup- N��i B�� National Park, L��m ���ng Province, Vietnam (12 �� 16 ��� 23.68 ��� N 10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41314d539010ca59de6a86fc6a984e21
Autor:
Ho��ng, ���c, ���m, ���nh Ph, Durand, Jean-Dominique, ���n, Ng��n Tr ���ng Tr, Phan, Ph��c ����nh
Tor mekongensis sp. nov. Holotype: UNS 00877, 337 mm SL; upper Ea Krong No drainage: upper Mekong basin in montane evergreen forest in Bidoup-N��i B�� National Park, L��m ���ng Province, Vietnam (12 �� 16 ��� 23.68
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd23d6dc2f34d2d0f63675212cdb80ca
Autor:
Ho��ng, ���c, ���m, ���nh Ph, Durand, Jean-Dominique, ���n, Ng��n Tr ���ng Tr, Phan, Ph��c ����nh
Neolissochilus stracheyi (Day 1871) Specimens examined: upper Ea Krong No drainage: upper Mekong basin in montane evergreen forest in Bidoup- N��i B�� National Park, L��m ���ng Province, Vietnam (12 �� 14 ��� 57.47
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddf40969536e1023b29b51a414e16d0a
Autor:
Ho��ng, ���c, ���m, ���nh Ph, Durand, Jean-Dominique, ���n, Ng��n Tr ���ng Tr, Phan, Ph��c ����nh
Tor dongnaiensis sp. nov. Holotype: UNS 00859, 240 mm SL; middle ���ng Nai drainage: C��t Ti��n National Park, L��m ���ng Province, Vietnam (11 �� 26 ��� 33.32 ��� N 107 �� 26 ��� 4.01
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28daf12392518c517e3e48bad979e87f
Autor:
L��, C��ng-Tr��nh
We give a $��$-constant criterion for equinormalizability of deformations of isolated (not necessarily reduced) curve singularities over smooth base spaces of dimension $\geq 1$. For one-parametric families of isolated curve singularities, we sho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::776e4456c05860f4a876d02c459eabc4
Autor:
L��, C��ng-Tr��nh
In this paper we give a version of Krivine-Stengle's Positivstellensatz, Schweighofer's Positivstellensatz, Scheiderer's local-global principle, Scheiderer's Hessian criterion and Marshall's boundary Hessian conditions for polynomial matrices, i.e. m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b9309d20c5edf96187f249a9f3b4e21