## Communicated by K. P. Hadeler During fertilization of certain echinoderms, a long actin-filled tube is extended by the sperm towards the interior of the egg. This yields a parabolic free boundary problem, which differs from the classical one-phase Stefan problem by the presence of a convective
A Problem of L System Interest
✍ Scribed by Hans-Dietrich O. F. Gronau; Günther Steffen
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 115 KB
- Volume
- 99
- Category
- Article
- ISSN
- 0025-584X
No coin nor oath required. For personal study only.
✦ Synopsis
The 12th problem of the L system problem book '75 [2] is equivalent to the following one :
Let N(n, k ) be the number of nonnegative integral matrices of order n with entries
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