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[[FrontPage]]
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[[Eng Page]]
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//#contents
* Publications with Peer Review [#y73bcd2b]
** Journal Articles [#zdf1a0e0]
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+ K. Umezu, Bifurcation approach to a logistic elliptic equation with a homogeneous incoming flux boundary condition, accepted in '''J. Differential Equations''', ''252'', (2012), 1146-1168. [[doi:10.1016/j.jde.2011.08.043:http://dx.doi.org/10.1016/j.jde.2011.08.043]]
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+ K. Umezu, Global bifurcation results for
semilinear elliptic boundary value problems with indefinite weights
and nonlinear boundary conditions, '''Nonlinear Differential Equations Appl. NoDEA''', ''17''(3), (2010), 323-336.
[[doi:10.1007/s00030-010-0056-3:http://dx.doi.org/10.1007/s00030-010-0056-3]]
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+ K. Umezu, Blowing-up properties of the positive
principal eigenvalue for indefinite Robin-type boundary
conditions, '''Rocky Mountain J. Math.''', ''40''(2), (2010), 673-694.
[[doi:10.1216/RMJ-2010-40-2-673:http://dx.doi.org/10.1216/RMJ-2010-40-2-673]]
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+ K. Umezu, Positive solutions of semilinear elliptic eigenvalue
problems with concave nonlinearities,
[['''Advances in Differential Equations''', ''12'':http://www.aftabi.com/ADE/ade12.html]] (12), (2007), 1415-1436.
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+ K. Umezu, Blowing-up of principal eigenvalues for Neumann boundary conditions, '''Proc. Roy. Soc. Edinburgh Sect. A''', ''137''(3), (2007), 567-579. [[doi:10.1017/S0308210506000060:http://dx.doi.org/10.1017/S0308210506000060]]
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+ K. Umezu, On eigenvalue problems with Robin type boundary conditions having indefinite coefficients, '''Applicable Analysis''', ''85''(11), (2006), 1313-1325. [[doi:10.1080/00036810500337860:http://dx.doi.org/10.1080/00036810500337860]]
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+ K. Umezu, Multiplicity of positive solutions under nonlinear boundary conditions for diffusive logistic equations, '''Proc. Edinburgh Math. Soc.''', ''47''(2), (2004), 495-512. [[doi:10.1017/S0013091503000294:http://dx.doi.org/10.1017/S0013091503000294]]
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+ 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.
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+ K. Umezu, Behavior and stability of positive solutions of nonlinear elliptic boundary value problems arising in population dynamics, '''Nonlinear Anal.''', ''49''(6), (2002), 817-840. [[doi:10.1016/S0362-546X(01)00142-0:http://dx.doi.org/10.1016/S0362-546X(01)00142-0]]
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+ K. Umezu, Bifurcation from infinity for asymptotically linear elliptic eigenvalue problems, '''J. Math. Anal. Appl.''', ''267''(2), (2002), 651-664.
[[doi:10.1006/jmaa.2001.7799:http://dx.doi.org/10.1006/jmaa.2001.7799]]
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+ K. Umezu, Nonlinear elliptic boundary value problems suggested by fermentation, '''Nonlinear Differential Equations Appl.(NoDEA)''', ''7''(2), (2000), 143-155. [[doi:10.1007/s000300050002:http://dx.doi.org/10.1007/s000300050002]]
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+ K. Umezu, Global positive solution branches of positone problems with nonlinear boundary conditions, [['''Differential Integral Equations''', ''13'':http://www.aftabi.com/DIE/die13.html]] (4-6), (2000),
669-686.
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+ K. Umezu,
Multiplicity of positive solutions to semilinear elliptic
boundary value problems,
'''Abstr. Appl. Anal.''', ''4''(3), (1999), 195-208. [[doi:10.1155/S1085337599000147:http://dx.doi.org/10.1155/S1085337599000147]]
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+ K. Umezu, Positive solutions of a forced nonlinear elliptic boundary value problem, '''J. Math. Soc. Japan''', ''51''(4), (1999), 801-815. [[doi:10.2969/jmsj/05140801:http://dx.doi.org/10.2969/jmsj/05140801]]
[[open access:http://projecteuclid.org/DPubS/Repository/1.0/Disseminate?view=body&id=pdf_1&handle=euclid.jmsj/1213107823]]
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+ K. Umezu and K. Taira, Growing-up positive solutions of semilinear elliptic boundary value problems, '''J. Math. Anal. Appl.''', ''238''(1), (1999), 196-215. [[doi:10.1006/jmaa.1999.6522:http://dx.doi.org/10.1006/jmaa.1999.6522]]
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+ K. Taira and K. Umezu, Semilinear elliptic boundary value problems in chemical reactor theory, '''J. Differential Equations''', ''142''(2), (1998), 434-454. [[doi:10.1006/jdeq.1997.3349:http://dx.doi.org/10.1006/jdeq.1997.3349]]
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+ K. Taira and K. Umezu, Positive solutions of sublinear elliptic boundary value problems, '''Nonlinear Anal.''', ''29''(7), (1997), 761-771. [[doi:10.1016/S0362-546X(96)00059-4:http://dx.doi.org/10.1016/S0362-546X(96)00059-4]]
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+ 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. [[doi:10.3836/tjm/1270042527:http://dx.doi.org/10.3836/tjm/1270042527]]
[[open access:http://projecteuclid.org/DPubS/Repository/1.0/Disseminate?view=body&id=pdf_1&handle=euclid.tjm/1270042527]]
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+ K. Taira and K. Umezu, Bifurcation for nonlinear elliptic boundary value problems III, [['''Adv. Differential Equations''', ''1'':http://www.aftabi.com/ADE/ade01.html]] (4), (1996), 709-727.
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+ 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. [[doi:10.3836/tjm/1270128189:http://dx.doi.org/10.3836/tjm/1270128189]]
[[open access:http://projecteuclid.org/DPubS/Repository/1.0/Disseminate?view=body&id=pdf_1&handle=euclid.tjm/1270128189]]
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+ 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.
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** Articles in Conference Proceedings [#ceb50aac]
+ 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.
[[doi:10.1007/3-7643-7385-7_29:http://dx.doi.org/10.1007/3-7643-7385-7_29]]
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+ K. Umezu, [['''One parameter-dependent nonlinear elliptic boundary value problems arising in population dynamics''':http://ebooks.worldscinet.com/ISBN/9789812701732/9789812701732_0013.html]], Advances in analysis, 177--186, World Sci. Publ., Hackensack, NJ, 2005.
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+ K. Umezu, [['''Bifurcation analysis in diffusive logistic equations with nonlinear boundary conditions''':http://eproceedings.worldscinet.com/9789812794253/9789812794253_0131.html]], Progress in analysis, Vol. I, II (Berlin, 2001), 1135--1141, World Sci. Publishing, River Edge, NJ, 2003.
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+ K. Umezu, [['''Bifurcation in population dynamics''':http://ebooks.worldscinet.com/ISBN/9789812777201/9789812777201_0046.html]], Elliptic and parabolic problems (Rolduc/Gaeta, 2001), 485-493, World Sci. Publishing, River Edge, NJ, 2002.
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+ K. Taira and K. Umezu, '''Stability in chemical reactor theory''', [[Evolution equations and their applications in physical and life sciences:http://www.amazon.co.jp/Evolution-Equations-Applications-Physical-Sciences/dp/0824790103/ref=sr_1_1?ie=UTF8&s=english-books&qid=1242491122&sr=1-1]] (Bad Herrenalb, 1998), 421-433, Lecture Notes in Pure and Appl. Math., 215, Dekker, New York, 2001
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+ K. Umezu,
'''Bifurcation and stability for diffusive logistic equations with nonlinear boundary conditions''', [[Nonlinear Boundary-Value Problems:http://iamm.ac.donetsk.ua/en/journals/j960/]], ''10'', IAMM of NAS of Ukraine, Donetsk, Ukraine, (2000), 193-198.
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+ 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):http://www.amazon.co.jp/Problems-Mathematical-International-Applications-Computation/dp/0792360052/ref=sr_1_1?ie=UTF8&s=english-books&qid=1242491015&sr=1-1]], 415-422, Int. Soc. Anal. Appl. Comput., 5, Kluwer Acad. Publ., Dordrecht, 2000.
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* Publications without peer review [#x49dfe34]
+ K. Umezu,
Stationary solutions of diffusive logistic equations with nonlinear
boundary conditions and large diffusion,
Seminar Notes of Mathematical Sciences, ''8'', Ibaraki Univ., (2005),
93-99.
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+ K. Umezu,
Nonlinear elliptic boundary value problems arising
in population genetics,
Bull. Maebashi Inst. Technology, ''3'', (2000), 93-96.
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+ K. Umezu,
Study on a semilinear elliptic boundary value
problem arising in chemical reactor theory (Japanese),
Bull. Maebashi Inst. Technology, ''1'', (1998), 97-102.
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+ K. Umezu and K. Taira,
Semilinear elliptic boundary value problems in chemical
reactor theory (Japanese),
Variational problems and related topics (Japanese) (Kyoto, 1997),
Surikaisekikenkyusho Kokyuroku No.1025, (Feb.1998), 99-117.
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