TY  - JOUR
AU  - Díaz Díaz, Jesús Ildefonso
AU  - Kawohl, B.
PY  - 1993
DO  - 10.1006/jmaa.1993.1257
SN  - 0022-247X
UR  - https://hdl.handle.net/20.500.14352/57488
T2  - Journal of Mathematical Analysis and Applications
AB  - "We consider some degenerate parabolic problems on a convex (or starshaped) ring. We prove that if the initial data have convex (or starshaped) level sets, then the solution u(t,⋅) has the same property for any positive t. Similar results are shown...
LA  - eng
M2  - 263
PB  - Elsevier
KW  - porous-medium equation
KW  - geometrical properties
KW  - obstacle problem
KW  - free-boundary
KW  - diffusion
KW  - stabilization
KW  - continuity
KW  - regularity
KW  - concavity
KW  - support
TI  - On convexity and starshapedness of level sets for some nonlinear elliptic and parabolic problems on convex rings
TY  - journal article
VL  - 177
ER  -