کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5500167 | 1533725 | 2017 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Completely exceptional 2nd order PDEs via conformal geometry and BGG resolution
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Completely exceptional 2nd order PDEs via conformal geometry and BGG resolution Completely exceptional 2nd order PDEs via conformal geometry and BGG resolution](/preview/png/5500167.png)
چکیده انگلیسی
By studying the development of shock waves out of discontinuity waves, in 1954 P. Lax discovered a class of PDEs, which he called “completely exceptional”, where such a transition does not occur after a finite time. A straightforward integration of the completely exceptional conditions allowed Boillat to show that such PDEs are actually of Monge-Ampère type. In this paper, we first recast these conditions in terms of characteristics, and then we show that the completely exceptional PDEs, with 2 or 3 independent variables, can be described in terms of the conformal geometry of the Lagrangian Grassmannian, where they are naturally embedded. Moreover, for an arbitrary number of independent variables, we show that the space of rth degree sections of the Lagrangian Grassmannian can be resolved via a BGG operator. In the particular case of 1st degree sections, i.e., hyperplane sections or, equivalently, Monge-Ampère equations, such operator is a close analogue of the trace-free second fundamental form.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Geometry and Physics - Volume 113, March 2017, Pages 86-103
Journal: Journal of Geometry and Physics - Volume 113, March 2017, Pages 86-103
نویسندگان
Jan Gutt, Gianni Manno, Giovanni Moreno,