HERTZ
发表于 2025-3-25 05:17:42
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BIDE
发表于 2025-3-25 10:16:00
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表脸
发表于 2025-3-25 14:52:59
https://doi.org/10.1007/978-3-531-19739-5, and some of its physical meanings which have been known for a long time. We then pass to survey some ideas and fundamental results about the metric induced by a system of vector fields, which are contained in some papers of the middle 1980’s. This area is by a now an independent field of study, bu
Blood-Vessels
发表于 2025-3-25 17:50:55
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Ligament
发表于 2025-3-25 21:41:43
Book 2014have been intensively studied since the late 1960s and are still an active field of research. This text provides the reader with a general overview of the field, with its motivations and problems, some of its fundamental results, and some recent lines of development..
设想
发表于 2025-3-26 04:10:01
An Invitation to Hypoelliptic Operators and Hörmander‘s Vector Fields978-3-319-02087-7Series ISSN 2191-8198 Series E-ISSN 2191-8201
范围广
发表于 2025-3-26 05:59:11
Marco BramantiIntroduces the fundamental ideas and discusses the classical results about Hörmander‘s operators.Provides the relevant motivations behind the research in this area, ranging on several different discip
calorie
发表于 2025-3-26 10:50:45
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对手
发表于 2025-3-26 14:18:13
https://doi.org/10.1007/978-3-319-02087-7Hörmander‘s operators; Hörmander‘s vector fields; hypoelliptic operators; partial differential equation
Psychogenic
发表于 2025-3-26 19:44:05
9楼