caa a22 4500 477075266 CHVBK 20180405111437.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF02827572 doi (NATIONALLICENCE)springer-10.1007/BF02827572 Interaction of conormal waves with strong and weak singularities for semi-linear equations [Elektronische Daten] [Wang Weike, Sheng Weiming] We first define a kind of new function space, called the space of twice conormal distributions. With some estimates on these function spaces, we can prove that if there exist two characteristic hypersurfaces bearing strong and weak singularities respectively intersect transversally, then some new singularities will take place and their strength will be no more than the original weak one. Springer, 1996 semi-linear hyperbolic partial differential equation nationallicence conormal distribution nationallicence nonlinear wave nationallicence energy estimate nationallicence Weike Wang Department of Mathematics, Wuhan University, 430072, Wuhan, China aut Weiming Sheng Department of Mathematics, Wuhan University, 430072, Wuhan, China aut Wuhan University Journal of Natural Sciences Wuhan University 1/1(1996-03-01), 20-24 1007-1202 1:1<20 1996 1 11859 https://doi.org/10.1007/BF02827572 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02827572 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Weike Wang Department of Mathematics, Wuhan University, 430072, Wuhan, China aut NATIONALLICENCE 700 1- Weiming Sheng Department of Mathematics, Wuhan University, 430072, Wuhan, China aut NATIONALLICENCE 773 0- Wuhan University Journal of Natural Sciences Wuhan University 1/1(1996-03-01), 20-24 1007-1202 1:1<20 1996 1 11859 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer