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[[FrontPage]] [[Eng Page]] //#contents * Journal Papers refereed [#bc80d942] - K. Umezu, Blowing-up properties of the positive principal eigenvalue for indefinite Robin-type boundary conditions, '''[[Rocky Mountain J. Math.:http://rmmc.asu.edu/rmj/rmj.html]]''', to appear. &ref(rmj4030.pdf); - K. Umezu, Positive solutions of semilinear elliptic eigenvalue problems with concave nonlinearities, '''[[Advances in Differential Equations:http://www.aftabi.com/ADE/ade.html]]''', ''12''(12), (2007), 1415-1436. /////////////////////////////////////////////////////////////// - K. Umezu, Blowing-up of principal eigenvalues for Neumann boundary conditions, '''[[Proc. Roy. Soc. Edinburgh Sect. A:http://www.ingentaconnect.com/content/rse/proca]]''', ''137'', (2007), 567-579. /////////////////////////////////////////////////////////////////// - K. Umezu, On eigenvalue problems with Robin type boundary conditions having indefinite coefficients, '''[[Applicable Analysis:http://www.tandf.co.uk/journals/titles/00036811.asp]]''', ''85''(11), (2006), 1313-1325. //////////////////////////////////////////////////////////////////// - K. Umezu, Multiplicity of positive solutions under nonlinear boundary conditions for diffusive logistic equations, '''[[Proc. Edinburgh Math. Soc.:http://journals.cambridge.org/action/displayJournal?jid=PEM]]''', ''47''(2), (2004), 495-512. ////////////////////////////////////////////////////////////////// - K. Umezu, Local bifurcation analysis and stability of steady-state solutions of diffusive logistic equations with nonlinear boundary conditions, '''[[Communications in Applied Analysis:http://www.dynamicpublishers.com/dynamic.htm]]''', ''8''(4), (2004), 533-547. /////////////////////////////////////////////////////////////////// - K. Umezu, Behavior and stability of positive solutions of nonlinear elliptic boundary value problems arising in population dynamics, '''[[Nonlinear Anal.:http://www.elsevier.com/wps/find/journaldescription.cws_home/239/description]]''', ''49''(6), (2002), 817-840. ///////////////////////////////////////////////////////////////////// - K. Umezu, Bifurcation from infinity for asymptotically linear elliptic eigenvalue problems, '''[[J. Math. Anal. Appl.:http://www.elsevier.com/wps/find/journaldescription.cws_home/622886/description#description]]''', ''267''(2), (2002), 651-664. //////////////////////////////////////////////////////////////// - K. Umezu, Nonlinear elliptic boundary value problems suggested by fermentation, '''[[Nonlinear Differential Equations Appl.(NoDEA):http://www.springerlink.com/(wf3zsa45hohlilr0exzzml55)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:101200,1]]''', ''7''(2), (2000), 143-155. ///////////////////////////////////////////////////////////////////// - K. Umezu, Global positive solution branches of positone problems with nonlinear boundary conditions, '''[[Differential Integral Equations:http://www.aftabi.com/DIE/die.html]]''', ''13''(4-6), (2000), 669-686. //////////////////////////////////////////////////////////////////////// - K. Umezu, Multiplicity of positive solutions to semilinear elliptic boundary value problems, '''[[Abstr. Appl. Anal.:http://www.hindawi.com/journals/aaa/]]''', ''4''(3), (1999), 195-208. ////////////////////////////////////////////////////////////////////// - K. Umezu, Positive solutions of a forced nonlinear elliptic boundary value problem, '''[[J. Math. Soc. Japan:http://www.kurims.kyoto-u.ac.jp/~jmsj/JMSJ.htm]]''', ''51''(4), (1999), 801-815. /////////////////////////////////////////////////////////////////////// - K. Umezu and K. Taira, Growing-up positive solutions of semilinear elliptic boundary value problems, '''[[J. Math. Anal. Appl.:http://www.elsevier.com/wps/find/journaldescription.cws_home/622886/description#description]]''', ''238''(1), (1999), 196-215. //////////////////////////////////////////////////////////////// - K. Taira and K. Umezu, Semilinear elliptic boundary value problems in chemical reactor theory, '''[[J. Differential Equations:http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6866&_auth=y&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=df7b3e2c6f279d60249c1cc43c456765]]''', ''142''(2), (1998), 434-454. //////////////////////////////////////////////////////////////////// - K. Taira and K. Umezu, Positive solutions of sublinear elliptic boundary value problems, '''[[Nonlinear Anal.:http://www.elsevier.com/wps/find/journaldescription.cws_home/239/description]]''', ''29''(7), (1997), 761-771. ////////////////////////////////////////////////////////////////// - K. Taira and K. Umezu, Bifurcation for nonlinear elliptic boundary value problems II, '''[[Tokyo J. Math.:http://www.tokyojm.jp/]]''', ''19''(2), (1996), 387-396. //////////////////////////////////////////////////////////////////// - K. Taira and K. Umezu, Bifurcation for nonlinear elliptic boundary value problems III, '''[[Adv. Differential Equations:http://www.aftabi.com/ADE/ade.html]]''', ''1''(4), (1996), 709-727. ////////////////////////////////////////////////////////////////////// - K. Umezu, L^p-approach to mixed boundary value problems for second-order elliptic operators, '''[[Tokyo J. Math.:http://www.tokyojm.jp/]]''', ''17''(1), (1994), 101-123. ////////////////////////////////////////////////////////////////// - K. Umezu, On the Cauchy problem for analytic semigroups with weak singularity, '''[[Tsukuba J. Math.:http://www.math.tsukuba.ac.jp/~journal/tjm/tjm.html]]''', ''15''(2), (1991), 275-292. /////////////////////////////////////////////// /////////////////////////////////////////////// * Proceeding Papers refereed [#n1111035] - K. Umezu, '''Non-existence of positive solutions for diffusive logistic equations with nonlinear boundary conditions''', Progress in Nonlinear Differential Equations and Their Applications, Vol.64, 497-507, Birkhauser, Basel/Switzerland, 2005. - K. Umezu, '''One parameter-dependent nonlinear elliptic boundary value problems arising in population dynamics''', Advances in analysis, 177--186, World Sci. Publ., Hackensack, NJ, 2005. - K. Umezu, '''Bifurcation analysis in diffusive logistic equations with nonlinear boundary conditions''', Progress in analysis, Vol. I, II (Berlin, 2001), 1135--1141, World Sci. Publishing, River Edge, NJ, 2003. - K. Umezu, '''Bifurcation in population dynamics''', Elliptic and parabolic problems (Rolduc/Gaeta, 2001), 485-493, World Sci. Publishing, River Edge, NJ, 2002. - K. Taira and K. Umezu, '''Stability in chemical reactor theory''', Evolution equations and their applications in physical and life sciences (Bad Herrenalb, 1998), 421-433, Lecture Notes in Pure and Appl. Math., 215, Dekker, New York, 2001 - K. Umezu and K. Taira, '''Positive solutions of semilinear elliptic boundary value problems in chemical reactor theory''', Direct and inverse problems of mathematical physics (Newark, DE, 1997), 415-422, Int. Soc. Anal. Appl. Comput., 5, Kluwer Acad. Publ., Dordrecht, 2000. ///////////////////////////////////////////////////////////////// end