Sorin V. Sabau

J-GLOBAL         Last updated: Sep 27, 2019 at 14:26
Sorin V. Sabau
Tokai University


I am interested in Differential Geometry and Bioinformatics.

In particular, I am interested in global Finsler geometry, the relation with the topology of the manifold, the flag curvature and the global behavior of geodesics.

In the field of bioinformatics, I am mainly interested in understanding the evolution of DNA and protein sequences by using mathematical methods.

Research Areas

  • Mathematics / Geometry / Finsler geometry

Academic & Professional Experience

Mar 2003
Department of Biology, Tokai University


Apr 1998
Mar 2001
Doctor, Department of mathematics, Tokyo Metropolitan University
Sep 1995
Jul 1998
Ph. D., Department of Mathematics, Al. I. Cuza University, Iasi, Romania

Published Papers

On Finsler manifolds admitting convex functions
Sabau V. S., P. Chansangiam
Balkan J. Geom. Appl.      2019   [Refereed][Invited]
The cut locus of a Randers rotational 2-sphere of revolution
Hama R. and Jaipong K., Sabau V. S.
Publ. Math. Debrecen   93(3-4) 387-412   2018   [Refereed][Invited]
Geodesic Distance Kernels
Somboon, U. and Pantaragphong P., Sabau V. S.
KMITL Sci. Tech. J.   17(1) 29-41   2017   [Refereed][Invited]
Berwald spaces of bounded curvature
Boonnam, N., Hama R., Sabau V. S.
AMAPN   33(2) 339-347   2017   [Refereed][Invited]
Geodesics on strong Kropina manifolds
Sabau V. S., Shibuya, K., Yoshikawa R.
European Journal of Mathematics   3 1172-1224   2017   [Refereed][Invited]
Riemannian and Finslerian spheres with fractal cut loci
Itoh J., Sabau V. S.
Diff. Geom. and its Applications   49 43-64   Dec 2016   [Refereed][Invited]
A variational problem for curves on Riemann-Finsler surfaces
Sabau V. S., Shibuya K.
Jour. Australian Math. Soc.   101(3) 418-430   Dec 2016   [Refereed][Invited]
The co-points are cut points of level sets for Busemann functions
Sabau V. S.
SIGMA 12   36    2016   [Refereed][Invited]
Kosambi-Cartan-Chern (KCC) theory for higher order dynamical systems
Harko T., Pantaragphong P., Sabau V. S.
International Journal of Geometric Methods in Modern Physics   13(1650014)    2016   [Refereed][Invited]
The cut locus and distance function from a closed subset of a Finsler manifold
Sabau V. S., Tanaka M.
Houston Journal of Mathematics   42(4) 1157-1197   2016   [Refereed][Invited]
The Geometry of a Randers rotational surface
Hama R., Chitsakul P., Sabau V. S.
Publ. Math. Debrecen   87(3-4) 473-502   2015   [Refereed][Invited]
Topology of complete Finsler manifolds admitting convex functions
Sabau V. S., Shiohama K.
Pacific Journal of Mathematics   276(2) 459-481   2015   [Refereed][Invited]
Some remarks on the geometry of Kropina spaces
Yoshikawa R., Sabau V. S.
Publ. Math. Debrecen   84(3-4) 483-496   2014   [Refereed][Invited]
Metric structures associated to Finsler metrics
Sabau V. S., Shibuya K., Shimada H.
Publ. Math. Debrecen   84(1-2) 89-103   2014   [Refereed][Invited]
Kropina metrics and Zermelo navigation on Riemannian manifolds
Yoshikawa R., Sabau V. S.
Geometria Dedicata   171 119-148   2014   [Refereed][Invited]
Generalized Finsler structures on closed 3-manifolds
Sabau V. S., Shibuya K., Pitis Gh.
Tohoku Math. Journal   66(3) 321-353   2014   [Refereed][Invited]
Two dimensional (alpha,beta)-metrics with reversible geodesics
Masca I. M., Sabau V. S., Shimada H.
Publ. Math. Debrecen   82(2) 485-501   2013   [Refereed][Invited]
Jacobi stability analysis of dynamical systems - applications in gravity and cosmology
Bohmer C. G., Harko T., Sabau V. S.
Adv. Theor. Math. Phys.   16 1145-1196   2012   [Refereed][Invited]
Finsler manifolds with reversible geodesics
Sabau V. S., Shimada H.
Rev. Roumaine Math. Pures Appl.   57(1) 91-103   2012   [Refereed][Invited]
Moving frames on generalized Finsler structures
Sabau V. S., Shibuya K., Shimada H.
J. Korean Math. Soc.   49(6) 1229-1257   2012   [Refereed][Invited]
Improvements in life expectancy in adult type 2 diabetes patients in the last six decades
Ioacara S., Guja C., Ionescu-Tirgoviste C., Fica S., Sabau V. S., Radu S., Micu A., Tiu C.
Diabetes Res Clin Pract.   92(3) 400   Jun 2011   [Refereed][Invited]
Geometrization of the scleronomic Riemannian mechanical systems
Miron R., Shimada H., Sabau V. S., Roman M.
Balkan J. Geom. Appl.   16(1) 78-97   2011   [Refereed][Invited]
A Gauss-Bonnet type formula on Riemann-Finsler surfaces with non-constant indicatrix volume
Itoh J., Sabau V. S., Shimada H.
Kyoto Journal of Mathematics   50(1) 165-192   2010   [Refereed][Invited]
Reversible geodesics for (alpha, beta)-metrics
Masca I. M., Sabau V. S., Shimada H.
International Journal of Mathematics   21(8) 1071-1094   2010   [Refereed][Invited]
On the existence of generalized unicorns on surfaces
Sabau V. S., Shibuya K., Shimada H.
Differential Geometry and its Applications   28(4) 406-435   2010   [Refereed][Invited]
Identification of Genes Downstream of Nodal in the Ciona intestinalis Embryo
Mita K., Koyanagi R., Azumi K., Sabau V. S., Fujiwara S.
Zoological Science   27(2) 69-75   2010   [Refereed][Invited]
Improvements in life expectancy in type 1 diabetes patients in the last six decades
Ioacara S., Lichiardopol R., Ionescu-Tirgoviste C., Cheta D., Sabau V. S., Guja C., Farcasiu E., Tiu C.
Diabetes Res. Clin. Pract.   86(2) 146-151   2009   [Refereed][Invited]
Localization and characterization of gamma-glutamyl cyclotransferase in cancer cells
Azumi K., Ikeda Y., Takeuchi T., Nomura T., Sabau V. S., Hamada J., Okada F., Hosokawa M., Yosokawa H.
Molecular Medicine Reports   2(3) 386-391   2009   [Refereed][Invited]
A novel method, digital genome scanning detects KRAS gene amplification in gastric cancers: involvement of overexpressed wild-type KRAS in downstream signaling and cancer cell growth
Mita H., Toyota M., Aoki F., Akashi H., Maruyama R., Sasaki Y., Suzuki H., Idogawa M., Kashima L., Yanagihara K., Fujita M., Hosokawa M., Kusano M., Sabau V. S., Tatsumi H., Imai K., Shinomura Y., Tokino T.
BMC Cancer   9(198)    2009   [Refereed][Invited]
The Randers metric and its role in electrodynamics
Shimada, H., Sabau V. S., Ingarden R.S.
Bull. Soc. Sci. Lett. Lodz Ser. Rech. Deform.   57 39-49   2008   [Refereed][Invited]
The (alpha, beta)-metric for Finsler space and its role in thermodynamics
Shimada, H., Sabau V. S., Ingarden R.S.
Bull. Soc. Sci. Lett. Lodz Ser. Rech. Deform.   57 25-38   2008   [Refereed][Invited]
Jacobi stability of the vacuum in the static spherically symmetric brane world models
Harko T., Sabau V. S.
Physical Review D   77(10)    2008   [Refereed][Invited]
The L-dual of a Matsumoto metric
Masca I.M., Sabau V. S., Shimada H.
Publicationes Mathematicae Debrecen   72(1-2) 227-242   2008   [Refereed][Invited]
The prospective analysis of mortality in type 2 diabetes subjects in Bucharest, Romania
Sabau V. S., Ioacara S., Serafinceanu C., Ionescu-Tirgoviste C.
Proc. Rom. Acad.   B(2) 141-148   2007   [Refereed][Invited]
cDNA microarray analyses reveal candidate marker genes for the detection of ascidian disease in Korea
Azumi K., Usami T., Kamimura A., Sabau V. S., Miki Y., Fujie M., Jung S-J., Kitamura S., Suzuki S., Yokosawa H.
Zoological Science   24(12) 1231-1240   2007   [Refereed][Invited]
Mortality trends in noninsulin-treated type 2 diabetes mellitus patients in the 1943-2000 period
Sabau V. S., Ioacara S., Ionescu-Tirgoviste C., Enachescu C., Farcasiu E., Bradescu O.
Romanian Journal of Internal Medicine   45(4) 371-377   2007   [Refereed][Invited]
Gene expression profile during the life cycle of the urochordate Ciona intestinalis
Azumi K., Sabau V. S., Fujie M., Usami T., Koyanagi R., Kawashima T., Fujiwara S., Ogasawara M., Satake M., Nonaka M., Wang H.G., Satou Y., Satoh N.
Developmental Biology   308(2) 572-582   2007   [Refereed][Invited]
The L-dual of an (alpha, beta) metric of order two
Masca I.M., Sabau V. S., Shimada H.
Balkan Journal of Geometry and Its Applications   12(1) 85-99   2007   [Refereed][Invited]
A pathophysiological approach to metabolic syndrome using factor analysis in an adult Romanian population
Ionescu-Targoviste C., Ioacara S., Lichiardopol R., Guja C., Sabau V. S., Bojin A., Apetrei E.
Arch. Physiol. Biochem.   112(3) 182-188   2006   [Refereed][Invited]
Introduction to Matsumoto metric
Sabau V. S., Shimada H.
Nonlinear Analysis   63(5-7) e165-e168   2005   [Refereed][Invited]
Some remarks on Jacobi stability
Sabau V. S.
Nonlinear Analysis   63(5-7) e143-e153   2005   [Refereed][Invited]
Systems biology and Deviation curvature tensor
Sabau V. S.
Nonlinear Analysis: Real World Applications   6 563-587   2005   [Refereed][Invited]
On Beta-change of the Antonelli-Shimada ecological metric
Roman M., Shimada H., Sabau V. S.
Tensor N. S.   65(1) 65-73   2004   [Refereed][Invited]
Randers metrics on CP^2
Sabau V. S.
Periodica Mathematica Hungarica   48(1-2) 25-31   2004   [Refereed][Invited]
Randers spaces of constant flag curvature induced by almost contact metric structures
Hasegawa I., Sabau V. S., Shimada H.
Hokkaido Mathematical Journal   33 215-232   2004   [Refereed][Invited]
Finsler spaces with (mu, beta)-metric
Miron R., Shimada H., Sabau V. S.
Publicationes Mathematicae Debrecen   62(3-4) 547-560   2003   [Refereed][Invited]
A Transient-states analysis of Tyson's model for the cell division cycle by means of KCC-theory
Antonelli P., Rutz S., Sabau V. S.
Open Systems and Information Dynamics   9(3) 223-238   2002   [Refereed][Invited]
A cell simulation for circadian rhythm based on Michaelis-Menten model
Sabau V. S., Nemoto Y., Hashimoto S., Ihara S.
Journal of Biological Physics   2(3) 465-469   2002   [Refereed][Invited]
Classes of Finsler spaces with (alpha, beta)-metrics
Sabau V. S., Shimada H.
Reports Math. Phys.   47(1) 31-48   2001   [Refereed][Invited]
Transient-states analysis of a 2-species Dynamical Ecological model via KCC-theory
Antonelli P., Maculan N., Portugal R., Rutz S., Sabau V. S.
Nonlinear Studies   8(3) 283-296   2001   [Refereed][Invited]
The electromagnetic field in the Second Order Relativistic Geometrical Optics
Sabau V. S., Shimada H.
The Memoirs of the Romanian Academy   IV(XXI) 37-52   1998   [Refereed][Invited]
New transform formulae for differential transformation method with applications to the nonlinear plane autonomous systems
Somboon, U. and Jaipong K., Sabau V. S.
Songlanakarin Journal of Science and Technology      2018   [Refereed][Invited]