Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Ray Redheffer"'
Autor:
Ray Redheffer, Richard R. Vance
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2003, Iss 43, Pp 2747-2758 (2003)
We give conditions under which two solutions x and y of the Kolmogorov equation x˙=xf(t,x) satisfy limy(t)/x(t)=1 as t→∞. This conclusion is important for two reasons: it shows that the long-time behavior of the population is independent of the
Externí odkaz:
https://doaj.org/article/2769e648d139434e9c8a2a38539512f9
Autor:
Ray Redheffer
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 32, Iss 2, Pp 73-80 (2002)
Several recent results pertaining to nonlinear equations of ecology are applied to a generalization of the Turner-Bradley-Kirk-Pruitt (TBKP) equation, which illustrates a variety of interesting possibilities as regards persistence and extinction. The
Externí odkaz:
https://doaj.org/article/658edce3e02d4d42b3eeca908aa6bb39
Autor:
Ray Redheffer
Publikováno v:
Demonstratio Mathematica. 39:131-136
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f00816f924aafe1b1351c68131da1983
https://doi.org/10.1515/dema-2006-0117
https://doi.org/10.1515/dema-2006-0117
Autor:
Ray Redheffer
Publikováno v:
Demonstratio Mathematica. 38:59-68
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c91ff4c2fedc54ccdd5d2deeebf64322
https://doi.org/10.1515/dema-2005-0109
https://doi.org/10.1515/dema-2005-0109
Autor:
Gerd Herzog, Ray Redheffer
Publikováno v:
Nonlinear Analysis: Real World Applications. 5:33-44
Remarks on positivity of certain vector-valued functions are applied to the SEIRS equations for infectious disease and to a nonlinear system recently introduced in connection with cell biology by Dr. Dennis Thron. In both cases the formerly constant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b237bc3019d49800c110321680a02dbb
https://doi.org/10.1016/s1468-1218(02)00075-5
https://doi.org/10.1016/s1468-1218(02)00075-5
Autor:
Ray Redheffer
Publikováno v:
Nonlinear Analysis: Real World Applications. 4:301-306
This paper is concerned with a nonautonomous version of the well-known May-Leonard system, that is, a system like theirs but with time-varying rather than constant coefficients. One consequence of their work is that the solution x exhibits partial su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::388523e75663fa00d74fbf2049d81ad7
https://doi.org/10.1016/s1468-1218(02)00021-4
https://doi.org/10.1016/s1468-1218(02)00021-4
Publikováno v:
The Prostate. 54:88-94
BACKGROUND PSA doubling time (PSADT) can predict the likelihood of clinical progression in patients with biochemical relapse after surgery or radiation for prostate cancer. Changes in PSA doubling time in response to therapy may be of clinical or inv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9762eb28d7b599f32c545defab721b04
https://doi.org/10.1002/pros.10176
https://doi.org/10.1002/pros.10176
Autor:
Ray Redheffer
Publikováno v:
Nonlinear Analysis: Theory, Methods & Applications. 46:1151-1164
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac49d7158e4de5589d90457f3589b420
https://doi.org/10.1016/s0362-546x(00)00166-8
https://doi.org/10.1016/s0362-546x(00)00166-8
Publikováno v:
Journal of Mathematical Analysis and Applications. 252(2):989-993
We extend Hardy's discrete inequality to multiple series. For an r -fold series the correct constant is ( c p ) r , where c p is the constant in Hardy's original theorem. This constant is optimum and the inequality is strict unless all variables in i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fffddd6c9a80bf75e7ebd376da2cb848
Autor:
Ray Redheffer
Publikováno v:
Journal of Mathematical Biology. 40:295-320
An interesting paper of Vance and Coddington concerning the scalar equation x = xf(t, x) is improved by a drastic weakening of the assumptions. Surprising as it may seem, this weakening simplifies the analysis and leads to stronger conclusions. An ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::75373efec85b4b41832042fa236178f7
https://doi.org/10.1007/s002850050182
https://doi.org/10.1007/s002850050182