Trosolwyg
Diddordebau ymchwil
- Theori Spectral a Gweithredwyr Gwahaniaethol
- Ffiseg Fathemategol
- Theori Spectral Gyfrifiadurol
- Dadansoddiad ar barthau â ffiniau afreolaidd
- Mannau Swyddogaeth ac Anghydraddoldebau
Grŵp ymchwil
Cyhoeddiad
2021
- Brown, B. M., Evans, W. D. and Wood, I. G. 2021. Non-negative extensions of Hamiltonian systems. In: Fritz Gesztesy, . and Andrei Martinez-Finkelshtein, . eds. From Operator Theory to Orthogonal Polynomials, Combinatorics, and Number Theory. Operator Theory: Advances and Applications Springer, pp. 15-39., (10.1007/978-3-030-75425-9_2)
2019
- Brown, B., Evans, W. D. and Wood, I. G. 2019. Positive self-adjoint operator extensions with applications to differential operators. Integral Equations and Operator Theory 91, article number: 41. (10.1007/s00020-019-2540-4)
2016
- Brown, B. M. and Evans, W. D. 2016. Selfadjoint and m sectorial extensions of Sturm-Liouville operators. Integral Equations and Operator Theory 85(2), pp. 151-166. (10.1007/s00020-016-2296-z)
2015
- Balinsky, A., Evans, W. D. and Roger, L. 2015. The analysis and geometry of Hardy's Inequality. Springer.
2013
- Edmunds, D. E., Evans, W. D. and Harris, D. J. 2013. The structure of compact linear operators in Banach spaces. Revista Mathematica Complutense 26(2), pp. 445-469. (10.1007/s13163-012-0107-x)
2012
- Balinsky, A., Evans, W. D. and Lewis, R. T. 2012. Hardy's inequality and curvature. Journal of Functional Analysis 262(2), pp. 648-666. (10.1016/j.jfa.2011.10.001)
2011
- Balinsky, A., Evans, W. D. and Umeda, T. 2011. The Dirac-Hardy and Dirac-Sobolev inequalities in L1. Publications of the Research Institute for Mathematical Sciences 47(3), pp. 791-801. (10.2977/PRIMS/51)
2010
- Balinsky, A. and Evans, W. D. 2010. Some recent results on Hardy-type inequalities. Applied Mathematics and Information Sciences 4(2), pp. 191-208.
- Balinsky, A. and Evans, W. D. 2010. Spectral Analysis of Relativistic Operators. London: Imperial College Press.
2009
- Evans, W. D. and Schmidt, K. M. 2009. A discrete Hardy-Laptev-Weidl type inequality and associated Schrödinger-type operators. Revista Matemática Complutense 22(1), pp. 75-90.
2008
- Balinsky, A., Evans, W. D. and Saito, Y. 2008. Dirac-Sobolev inequalities and estimates for the zero modes of massless Dirac operators. Journal of Mathematical Physics 49(4), article number: 43514. (10.1063/1.2912229)
- Balinsky, A., Evans, W. and Hundertmark, D. 2008. On inequalities of Hardy-Sobolev type. Banach Journal of Mathematical Analysis (BJMA) 2(2), pp. 94-106.
2006
- Brown, B. M. and Evans, W. D. 2006. Foreword. Journal of Computational and Applied Mathematics 194(1), pp. 1. (10.1016/j.cam.2005.06.032)
2005
- Evans, W. D. and Solomyak, M. 2005. Smilansky's model of irreversible quantum graphs: I. The absolutely continuous spectrum. Journal of Physics A: Mathematical and General 38(21), pp. 4611-4627. (10.1088/0305-4470/38/21/007)
2004
- Brown, B. M. and Evans, W. D. 2004. Preface [Editorial]. Journal of Computational and Applied Mathematics 171(1-2), pp. ix. (10.1016/j.cam.2004.01.004)
- Evans, W. D., Harris, D. J. and Saito, Y. 2004. On the approximation numbers of Sobolev embeddings on singular domains and trees. The Quarterly Journal of Mathematics 55(3), pp. 267-302. (10.1093/qmath/hag050)
- Brown, B. M., Eastham, M. S. P. and Evans, W. D. 2004. Laudatum. Journal of computational and applied mathematics 171(1-2), pp. xi-xiii. (10.1016/j.cam.2004.01.034)
2003
- Brown, B. M., Evans, W. D. and Plum, M. 2003. Titchmarsh-Sims-Weyl theory for complex Hamiltonian systems. Proceedings of the London Mathematical Society 87(2), pp. 419-450. (10.1112/S0024611503014096)
2002
- Balinsky, A. and Evans, W. D. 2002. On the Zero Modes of Weyl-Dirac Operators and their Multiplicity. Bulletin of the London Mathematical Society 34(2), pp. 236-242. (10.1112/S0024609301008736)
- Balinsky, A. and Evans, W. D. 2002. On the spectral properties of the Brown-Ravenhall operator. Journal of Computational and Applied Mathematics 148(1), pp. 239-255. (10.1016/S0377-0427(02)00583-6)
2001
- Balinsky, A., Evans, W. D. and Lewis, R. T. 2001. On the number of negative eigenvalues of Schrödinger operators with an Aharanov-Bohm magnetic field. Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences 457(2014), pp. 2481-2489. (10.1098/rspa.2001.0851)
- Evans, W. D., Harris, D. J. and Lang, J. 2001. The approximation numbers of Hardy-type operators on trees. Proceedings of the London Mathematical Society 83(2), pp. 390-418. (10.1112/plms/83.2.390)
- Balinsky, A. and Evans, W. D. 2001. On the zero modes of Pauli operators. Journal of Functional Analysis 179(1), pp. 120-135. (10.1006/jfan.2000.3670)
- Balinsky, A., Evans, W. D. and Lewis, R. T. 2001. Sobolev, Hardy and CLR inequalities associated with Pauli operators in R3 [Letter]. Journal of Physics A: Mathematical and General 34(5), pp. L19-L23. (10.1088/0305-4470/34/5/101)
1999
- Balinsky, A. and Evans, W. D. 1999. On the stability of relativistic one-electron molecules [Letter]. Journal of Physics A: Mathematical and General 32(11), pp. L129-L132. (10.1088/0305-4470/32/11/001)
- Balinsky, A. and Evans, W. D. 1999. Stability of One-Electron Molecules in the Brown-Ravenhall Model. Communications in Mathematical Physics 202(2), pp. 481-500. (10.1007/s002200050592)
1998
- Balinsky, A. and Evans, W. D. 1998. On the virial theorem for the relativistic operator of Brown and Ravenhall, and the absence of embedded Eigenvalues. Letters in Mathematical Physics 44(3), pp. 233-248. (10.1023/A:1007425400991)
1993
- Beynon, M. J., Brown, B. M. and Evans, W. D. 1993. On an Inequality of the Kolmogorov Type for a Second-Order Differential Expression. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 442(1916), pp. 555-569. (10.1098/rspa.1993.0121)
Adrannau llyfrau
- Brown, B. M., Evans, W. D. and Wood, I. G. 2021. Non-negative extensions of Hamiltonian systems. In: Fritz Gesztesy, . and Andrei Martinez-Finkelshtein, . eds. From Operator Theory to Orthogonal Polynomials, Combinatorics, and Number Theory. Operator Theory: Advances and Applications Springer, pp. 15-39., (10.1007/978-3-030-75425-9_2)
Erthyglau
- Brown, B., Evans, W. D. and Wood, I. G. 2019. Positive self-adjoint operator extensions with applications to differential operators. Integral Equations and Operator Theory 91, article number: 41. (10.1007/s00020-019-2540-4)
- Brown, B. M. and Evans, W. D. 2016. Selfadjoint and m sectorial extensions of Sturm-Liouville operators. Integral Equations and Operator Theory 85(2), pp. 151-166. (10.1007/s00020-016-2296-z)
- Edmunds, D. E., Evans, W. D. and Harris, D. J. 2013. The structure of compact linear operators in Banach spaces. Revista Mathematica Complutense 26(2), pp. 445-469. (10.1007/s13163-012-0107-x)
- Balinsky, A., Evans, W. D. and Lewis, R. T. 2012. Hardy's inequality and curvature. Journal of Functional Analysis 262(2), pp. 648-666. (10.1016/j.jfa.2011.10.001)
- Balinsky, A., Evans, W. D. and Umeda, T. 2011. The Dirac-Hardy and Dirac-Sobolev inequalities in L1. Publications of the Research Institute for Mathematical Sciences 47(3), pp. 791-801. (10.2977/PRIMS/51)
- Balinsky, A. and Evans, W. D. 2010. Some recent results on Hardy-type inequalities. Applied Mathematics and Information Sciences 4(2), pp. 191-208.
- Evans, W. D. and Schmidt, K. M. 2009. A discrete Hardy-Laptev-Weidl type inequality and associated Schrödinger-type operators. Revista Matemática Complutense 22(1), pp. 75-90.
- Balinsky, A., Evans, W. D. and Saito, Y. 2008. Dirac-Sobolev inequalities and estimates for the zero modes of massless Dirac operators. Journal of Mathematical Physics 49(4), article number: 43514. (10.1063/1.2912229)
- Balinsky, A., Evans, W. and Hundertmark, D. 2008. On inequalities of Hardy-Sobolev type. Banach Journal of Mathematical Analysis (BJMA) 2(2), pp. 94-106.
- Brown, B. M. and Evans, W. D. 2006. Foreword. Journal of Computational and Applied Mathematics 194(1), pp. 1. (10.1016/j.cam.2005.06.032)
- Evans, W. D. and Solomyak, M. 2005. Smilansky's model of irreversible quantum graphs: I. The absolutely continuous spectrum. Journal of Physics A: Mathematical and General 38(21), pp. 4611-4627. (10.1088/0305-4470/38/21/007)
- Brown, B. M. and Evans, W. D. 2004. Preface [Editorial]. Journal of Computational and Applied Mathematics 171(1-2), pp. ix. (10.1016/j.cam.2004.01.004)
- Evans, W. D., Harris, D. J. and Saito, Y. 2004. On the approximation numbers of Sobolev embeddings on singular domains and trees. The Quarterly Journal of Mathematics 55(3), pp. 267-302. (10.1093/qmath/hag050)
- Brown, B. M., Eastham, M. S. P. and Evans, W. D. 2004. Laudatum. Journal of computational and applied mathematics 171(1-2), pp. xi-xiii. (10.1016/j.cam.2004.01.034)
- Brown, B. M., Evans, W. D. and Plum, M. 2003. Titchmarsh-Sims-Weyl theory for complex Hamiltonian systems. Proceedings of the London Mathematical Society 87(2), pp. 419-450. (10.1112/S0024611503014096)
- Balinsky, A. and Evans, W. D. 2002. On the Zero Modes of Weyl-Dirac Operators and their Multiplicity. Bulletin of the London Mathematical Society 34(2), pp. 236-242. (10.1112/S0024609301008736)
- Balinsky, A. and Evans, W. D. 2002. On the spectral properties of the Brown-Ravenhall operator. Journal of Computational and Applied Mathematics 148(1), pp. 239-255. (10.1016/S0377-0427(02)00583-6)
- Balinsky, A., Evans, W. D. and Lewis, R. T. 2001. On the number of negative eigenvalues of Schrödinger operators with an Aharanov-Bohm magnetic field. Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences 457(2014), pp. 2481-2489. (10.1098/rspa.2001.0851)
- Evans, W. D., Harris, D. J. and Lang, J. 2001. The approximation numbers of Hardy-type operators on trees. Proceedings of the London Mathematical Society 83(2), pp. 390-418. (10.1112/plms/83.2.390)
- Balinsky, A. and Evans, W. D. 2001. On the zero modes of Pauli operators. Journal of Functional Analysis 179(1), pp. 120-135. (10.1006/jfan.2000.3670)
- Balinsky, A., Evans, W. D. and Lewis, R. T. 2001. Sobolev, Hardy and CLR inequalities associated with Pauli operators in R3 [Letter]. Journal of Physics A: Mathematical and General 34(5), pp. L19-L23. (10.1088/0305-4470/34/5/101)
- Balinsky, A. and Evans, W. D. 1999. On the stability of relativistic one-electron molecules [Letter]. Journal of Physics A: Mathematical and General 32(11), pp. L129-L132. (10.1088/0305-4470/32/11/001)
- Balinsky, A. and Evans, W. D. 1999. Stability of One-Electron Molecules in the Brown-Ravenhall Model. Communications in Mathematical Physics 202(2), pp. 481-500. (10.1007/s002200050592)
- Balinsky, A. and Evans, W. D. 1998. On the virial theorem for the relativistic operator of Brown and Ravenhall, and the absence of embedded Eigenvalues. Letters in Mathematical Physics 44(3), pp. 233-248. (10.1023/A:1007425400991)
- Beynon, M. J., Brown, B. M. and Evans, W. D. 1993. On an Inequality of the Kolmogorov Type for a Second-Order Differential Expression. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 442(1916), pp. 555-569. (10.1098/rspa.1993.0121)
Llyfrau
- Balinsky, A., Evans, W. D. and Roger, L. 2015. The analysis and geometry of Hardy's Inequality. Springer.
- Balinsky, A. and Evans, W. D. 2010. Spectral Analysis of Relativistic Operators. London: Imperial College Press.
Ymchwil
Prosiectau ymchwil cyfredol
- Anghydraddoldebau caled a Rellich
- Dulliau sero gweithredwyr Dirac massless
- Cynrychioliadau gweithredwyr llinellol cryno mewn mannau Banach a phroblemau eigenvalue aflinol
- Spectra o'r Neumann Laplacian ar barthau afreolaidd
- Anghydraddoldebau pwysoledig sy'n cynnwys gweithredwyr rho-quasiconcave
Cyllid allanol ers 2000
EPSRC
- GR/N20560 (£4,800) Cymrodoriaeth Ymweld ar gyfer yr Athro Y. Saito, Mehefin, 2000
- GR/R37111/01 (£63,829) Rhwydwaith Theori Spectral, 2001-04 (gydag Profs B.M.Brown ac E.B.Davies)
- GR/R20885/01 (£111,374) Cynorthwyydd Ymchwil ar gyfer Dr R. Romanov, 2002-05 (gyda Drs B.M.Brown ac M.Marletta)
- GR/R95586/01 (£123,595) Cynorthwyydd Ymchwil ar gyfer Dr A.Tuykov, 2003-06 (gyda Dr A.Balinsky)
- GR/S47229 (£8,113) Cymrodoriaeth Ymweld ar gyfer yr Athro S. Naboko, 2004 (gyda'r Athro B.M.Brown a Dr M. Marletta)
- GR/T01556 (£8,150) Cymrodoriaeth Ymweld ar gyfer yr Athro M. Solomyak, Gorffennaf 2004
- EP/E04834X (£3,815) Cymrodoriaeth Ymweld ar gyfer yr Athro Y. Saito, Ebrill, 2007
Ffynonellau eraill
- Ymddiriedolaeth Leverhulme (F/00407/E) (£19,500) Prosiect ymchwil cydweithredol gyda Sefydliad Mathemateg Prague, 01.03.01-29.02.04
- NATO (£6,490) (PST). CLG.978694) Prosiect ymchwil cydweithredol gyda grwpiau Ewropeaidd, 01.04.02-31.03.04
Sgyrsiau mawr ers 2004
- Gweithdy Warwick ar nifer fawr o systemau'r corff, 23-28 Awst, 2004
- Darlith lawn i gynhadledd ISAAC yn Ankara, 13-18 Awst, 2007
Llyfrau
- Edmunds, D.E. ac Evans, W.D. 2004. Gweithredwyr caled, mannau swyddogaeth ac ymwreiddio. Berlin, Heidelberg: Springer.
- Edmunds, D.E. ac Evans, W.D. 2013. Cynrychiolaeth gweithredwyr llinol rhwng mannau banach. Heidelberg, Efrog Newydd, Llundain: Birkhauser-Springer,
- Balinsky, A., Evans, W.D. a Lewis, R.T. 2015. Dadansoddiad a geometreg Hardy's Inequality. Berlin, Llundain: Springer.
Addysgu
Wedi graddio (ers 2000)
- R.Wilson
- A.Al-Homaidan
- S.Monaquel
- J.Thomas
Bywgraffiad
Addysg
- B.Sc. (Cymru) 1961
- D.Phil. (Rhydychen) 1965
Goruchwylwyr
- E.C.Titchmarsh FRS
- JB.McLeod FRS
Swyddi ymchwil
- Darlithydd Cynorthwyol, UC Caerdydd, 1964-65
- Darlithydd, UC Caerdydd, 1965-73
- Uwch Ddarlithydd, UC Caerdydd, 1973-75
- Darllenydd, Prifysgol Cymru, 1975-77
- Athro Mathemateg Pur, Prifysgol Cymru, 1977- yn cyflwyno
- Athro Emeritws, Prifysgol Caerdydd, 2008- yn cyflwyno
Anrhydeddau a dyfarniadau
- Cymrawd Cymdeithas Ddysgedig Cymru 2010/11