Notes on geometric aspects of effectively hyperbolic critical points when the characteristic roots are real on one side of time. (English) Zbl 07922243
Summary: Geometric aspects of effectively hyperbolic critical points on time \(t=0\) are discussed assuming that the characteristic roots are real on one side of time \(t\), namely time is positive. In particular, we aim to elucidate the differences in the geometric aspects of effectively hyperbolic critical points on time \(t=0\) when the characteristic roots are real on both the positive and negative sides of time.
MSC:
| 35L10 | Second-order hyperbolic equations |
| 35L15 | Initial value problems for second-order hyperbolic equations |
| 35L80 | Degenerate hyperbolic equations |
References:
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