Found 168 Documents (Results 1–100)
Heteroclinic loop bifurcations by perturbing a class of \(\mathrm{Z}_2\)-equivariant quadratic switching Hamiltonian systems with nilpotent singular points. (English) Zbl 1534.34026
Reviewer: Zhengdong Du (Chengdu)
Exactly solvable quadratic differential equation systems through generalized inversion. (English) Zbl 1517.34020
Reviewer: Alexander Prokopenya (Warszawa)
The problem of the extension of \(D(4)\)-triple \(\{1, b, c\}\). (English) Zbl 1523.11056
Reviewer: Mahadi Ddamulira (Kampala)
On an asymptotics of the number of representations of a pair of integers by quadratic and linear forms with congruential condition. (English. Russian original) Zbl 1505.11068
Math. Notes 111, No. 5, 736-746 (2022); translation from Mat. Zametki 111, No. 5, 726-737 (2022).
Reviewer: Meinhard Peters (Münster)
Splitting quaternion algebras defined over a finite field extension. (English) Zbl 1500.12003
Reviewer: Adam Chapman (Tel Hai)
Solutions of a class of quartic Thue inequalities. (English) Zbl 1490.11040
Reviewer: Günter Lettl (Graz)
Quadratic planar differential systems with algebraic limit cycles via quadratic plane Cremona maps. (English) Zbl 1479.34056
Note on Halphen’s system. (English) Zbl 1485.14087
Phase portraits of the quadratic polynomial Liénard differential systems. (English) Zbl 1466.37019
Reviewer: Alexander Grin (Grodno)
Pfister’s local-global principle and systems of quadratic forms. (English) Zbl 1464.11039
Reviewer: Adam Chapman (Tel Hai)
Visualization of four limit cycles in near-integrable quadratic polynomial systems. (English) Zbl 1506.34049
Applications of systems of quadratic forms to generalised quadratic forms. (English) Zbl 1459.11100
Reviewer: Ahmet Tekcan (Bursa)
Abelian integrals from an unfolding of codimension-3 singularities with nilpotent linear part. (English) Zbl 1452.34044
Bifurcation analysis in planar quadratic differential systems with boundary. (English) Zbl 1510.34076
Bifurcation analysis on a class of three-dimensional quadratic systems with twelve limit cycles. (English) Zbl 1433.34046
Quadratic descent of Hermitian forms. (English) Zbl 1443.11028
Math. Nachr. 292, No. 10, 2294-2299 (2019); corrigendum ibid. 293, No. 9, 1836-1838 (2020).
Balanced truncation for model order reduction of linear dynamical systems with quadratic outputs. (English) Zbl 1420.65073
The dynamics of super-Apollonian continued fractions. (English) Zbl 1436.11011
Reviewer: Thomas B. Ward (Leeds)
Smallest representatives of \(\operatorname{SL}(2,\mathbb{Z})\)-orbits of binary forms and endomorphisms of \(\mathbb{P}^1\). (English) Zbl 1419.37091
Phase portraits of Abel quadratic differential systems of second kind with symmetries. (English) Zbl 1415.34038
Structured eigenvalue/eigenvector backward errors of matrix pencils arising in optimal control. (English) Zbl 1407.49052
There are no Diophantine quadruples of Fibonacci numbers. (English) Zbl 1441.11058
Reviewer: Krassimir Atanassov (Sofia)
Hermitian forms and systems of quadratic forms. (English) Zbl 1405.11041
Reviewer: Albrecht Pfister (Mainz)
Eigenvectors of orthogonally decomposable functions. (English) Zbl 1475.15007
Reviewer: P. Shakila Banu (Erode)
Sturm-Liouville matrix differential systems with singular leading coefficient. (English) Zbl 1392.34021
Reviewer: Natalia Bondarenko (Saratov)
Reduction method for search of chaotic attractors in generic autonomous quadratic dynamical systems. (English) Zbl 1360.34086
New parametrization of \(A^2 + B^2 + C^2 = 3D^2\) and Lagrange’s four-square theorem. (New parametrization of \(A^2 + B^2 + C^2 = 3D^2\) and Langrange’s four-square theorem.) (English) Zbl 1389.52016
Representations of integers by systems of three quadratic forms. (English) Zbl 1396.11122
Reviewer: D. R. Heath-Brown (Oxford)
Canonical form of ternary generalized differential Lyapunov-Darboux system with quadratic nonlinearities. (English) Zbl 1424.34121
Numerical linear algebra methods for linear differential-algebraic equations. (English) Zbl 1343.65100
Ilchmann, Achim (ed.) et al., Surveys in differential-algebraic equations III. Cham: Springer (ISBN 978-3-319-22427-5/pbk; 978-3-319-22428-2/ebook). Differential-Algebraic Equations Forum, 117-175 (2015).
Reviewer: Irina V. Konopleva (Ul’yanovsk)
Real and integer Wedderburn rank reduction formulas for matrix decompositions. (English) Zbl 1330.15016
On the theory of self-adjoint extensions of symmetric operators and its applications to quantum physics. (English) Zbl 1327.81199
MSC:
81Q10
81Q35
81Q93
58A10
58C35
58C40
58J32
58J50
58J70
53C21
53C55
53C80
46C05
46N50
35Q40
35Q41
Linear algebra and matrices. Topics for a second course. (English) Zbl 1334.15002
Pure and Applied Undergraduate Texts 24. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-1852-6/hbk). xv, 317 p. (2015).
Reviewer: Rabe von Randow (Bonn)
MSC:
15-01
15B10
15B34
05B20
15A21
15B57
15A18
15A63
15A60
15A23
15B48
05C50
05C20
05B05
94B05
37C10
Ten limit cycles around a center-type singular point in a 3-d quadratic system with quadratic perturbation. (English) Zbl 1336.34051
Reviewer: Valery Romanovski (Maribor)
On the local and global principle for system of binary rational cubic forms. (English) Zbl 1342.11049
MSC:
11E76
Bifurcation diagrams and quotient topological spaces under the action of the affine group on a subclass of quadratic vector fields. (English) Zbl 1330.34067
Choban, Mitrofan (ed.) et al., The third conference of the Mathematical Society of the Republic of Moldova dedicated to the 50th anniversary of the foundation of the Institute of Mathematics and Computer Science, ASM, Chişinău, Republic of Moldova, August 19–23, 2014. Abstracts. Chişinău: Academy of Sciences of Moldova, Institute of Mathematics and Computer Science (ISBN 978-9975-68-244-2/pbk). Proceedings IMCS-50, 183-186 (2014).
Strongly elliptic linear operators without coercive quadratic forms. I: Constant coefficient operators and forms. (English) Zbl 1323.35026
Reviewer: Zhiqing Han (Dalian)
On the family of \(D(4)\)-triples \(\{k-2, k+2, 4k^3-4k\}\). (English) Zbl 1323.11018
Reviewer: Volker Ziegler (Salzburg)
The number of Diophantine quintuples II. (English) Zbl 1289.11031
Reviewer: Lajos Hajdu (Debrecen)
A Coxeter-Gram classification of positive simply laced edge-bipartite graphs. (English) Zbl 1272.05072
The \(u\)-invariant of \(p\)-adic function fields. (English) Zbl 1276.11050
Reviewer: Detlev Hoffmann (Dortmund)
On bilinear forms based on the resolvent of large random matrices. (English. French summary) Zbl 1272.15020
Reviewer: Wai-Shun Cheung (Hong Kong)
Vectors, pure and applied. A general introduction to linear algebra. (English) Zbl 1263.15001
Cambridge: Cambridge University Press (ISBN 978-1-107-03356-6/hbk; 978-1-107-67522-3/pbk; 978-1-139-52003-4/ebook). xii, 444 p. (2013).
Reviewer: Juan Ramon Torregrosa Sanchez (Valencia)
Parallel Cholesky-based reduction for the weighted integer least squares problem. (English) Zbl 1351.86027
Decoupling of singular quadratic systems based on spectral transformation. (Chinese. English summary) Zbl 1274.34115
MSC:
34C20
Converting a general 3-D autonomous quadratic system to an extended Lorenz-type system. (English) Zbl 1228.34056
Automorphisms and derivations of homogeneous quadratic differential systems. (English) Zbl 1265.37006
Bifurcation diagrams and moduli spaces of planar quadratic vector fields with invariant lines of total multiplicity four and having exactly three real singularities at infinity. (English) Zbl 1221.34081
Reviewer: Antonio Linero Bas (Murcia)
Normal forms of quadratic vector fields and the Shi Songling equation. (English. Russian original) Zbl 1218.34032
Differ. Equ. 46, No. 5, 649-659 (2010); translation from Differ. Uravn. 46, No. 5, 647-657 (2010).
Reviewer: Alexander Grin (Grodno)
Nabla time scale symplectic systems and related quadratic functionals. (English) Zbl 1214.34091
Reviewer: Yuri E. Gliklikh (Voronezh)
Dissipativity and stability analysis using rational quadratic differential forms. (English) Zbl 1198.93073
Willems, Jan C. (ed.) et al., Perspectives in mathematical system theory, control, and signal processing. A Festschrift in honor of Yutaka Yamamoto on the occasion of his 60th birthday. Invited papers of the symposium, Kyoto, Japan, March 29–31, 2010. Berlin: Springer (ISBN 978-3-540-93917-7/pbk; 978-3-540-93918-4/ebook). Lecture Notes in Control and Information Sciences 398, 229-238 (2010).
The orthogonal \(u\)-invariant of a quaternion algebra. (English) Zbl 1206.11042
Reviewer: Albrecht Pfister (Mainz)
Probabilistic analyses of lattice reduction algorithms. (English) Zbl 1230.11156
Nguyen, Phong Q. (ed.) et al., The LLL algorithm. Survey and applications. Dordrecht: Springer (ISBN 978-3-642-02294-4/hbk; 978-3-642-02295-1/ebook). Information Security and Cryptography, 71-143 (2010).
Reviewer: Juan Tena Ayuso (Valladolid)
Linear algebra. An introduction using Mathematica. Reprint of the 2000 hardback original. (English) Zbl 1196.15002
San Diego, CA: Academic Press (ISBN 978-0-12-381401-2/hbk). xiv, 509 p., appendix 62 p., index 10 p. (2009).
The full study of planar quadratic differential systems possessing a line of singularities at infinity. (English) Zbl 1168.34024
Reviewer: Armengol Gasull (Barcelona)
Limit cycles of quadratic systems. (English) Zbl 1171.34312
Reviewer: He Chungyou (Nanjing)
Potpourri of conjectures and open questions in nonlinear analysis and optimization. (English) Zbl 1120.15025
Reviewer: Erich W. Ellers (Toronto)
Applied linear algebra and matrix analysis. (English) Zbl 1128.15001
Undergraduate Texts in Mathematics. New York, NY: Springer (ISBN 978-0-387-33195-9/pbk; 978-0-387-33194-2/hbk; 978-0-387-48947-6/ebook). xii, 383 p. (2007).
Reviewer: Mohammad Sal Moslehian (Mashhad)
Investigation of exponential dichotomy of linear Itô’s stochastic systems with random initial data by using quadratic forms. (Ukrainian, English) Zbl 1124.60050
Ukr. Mat. Zh. 58, No. 4, 543-553 (2006); translation in Ukr. Math. J. 58, No. 4, 619-629 (2006).
MSC:
60H10
A study of dichotomy of linear systems of difference equations using the quadratic forms. (English) Zbl 1080.39001
Reviewer: Costică Moroşanu (Iaşi)
MSC:
39A10
Hardy-Littlewood system and representations of integers by an invariant polynomial. (English) Zbl 1196.11057
Recursive exact \(H_{\infty }\)-identification from impulse-response measurements. (English) Zbl 1157.93356
Definiteness of quadratic functionals. (English) Zbl 1070.49014
Reviewer: Roman Hilscher (Brno)
Normalizable, integrable, and linearizable saddle points for complex quadratic systems in \(\mathbb{C}^2\). (English) Zbl 1022.37035
Reviewer: Valery A.Gaiko (Minsk)
Dichotomies and stability in nonautonomous linear systems. (English) Zbl 1026.93003
Reviewer: A.Akutowicz (Berlin)
Computation of large-scale quadratic forms and transfer functions using the theory of moments, quadrature and Padé approximation. (English) Zbl 1054.65039
Bourlioux, Anne (ed.) et al., Modern methods in scientific computing and applications. Proceedings of the NATO Advanced Study Institute and Séminaire de Mathématiques Supérieures on modern methods in scientific computing and applications, Montréal, Québec, Canada, July 9–20, 2001. Dordrecht: Kluwer Academic Publishers (ISBN 1-4020-0782-5/pbk). NATO Sci. Ser. II, Math. Phys. Chem. 75, 1-30 (2002).
Isotropic tori, complex germ and Maslov index, normal forms and quasimodes of multidimensional spectral problems. (English. Russian original) Zbl 1013.58014
Math. Notes 69, No. 4, 437-466 (2001); translation from Mat. Zametki 69, No. 4, 483-514 (2001).
Reviewer: Mircea Puta (Timisoara)
Uniqueness of algebraic limit cycles for quadratic systems. (English) Zbl 0995.34024
Reviewer: Armengol Gasull (Bellaterra, Barcelona)
Robust stabilization of uncertain input-delayed systems using reduction method. (English) Zbl 0969.93035
Reviewer: Vladimir Răsvan (Craiova)
Discrete-time average positivity and spectral factorization in a behavioral framework. (English) Zbl 1103.93316
Linear algebra. An introduction using Mathematica. (English) Zbl 0983.15002
San Diego, CA: Academic Press. xiv, 590 p., appendix 72 p. (2000).
Reviewer: Michael Jung (Dresden)
Symmetry, singularities and integrability in complex dynamics. I: The reduction problem. (English) Zbl 0989.34074
Reviewer: G.Czichowski (Greifswald)
Asymptotic properties of Abelian integrals arising in quadratic systems. (English) Zbl 1009.34030
Reviewer: Carmen Chicone (Columbia)
Spectral asymptotics of the \(N\) particle Schrödinger equations when \(N\to\infty\) and normal forms of the quadratic boson operators. (English) Zbl 0941.81027
Ramírez de Arellano, E. (ed.) et al., Complex analysis and related topics. In part the proceedings of the international symposium, Cuernavaca, Mexico, November 1996. Basel: Birkhäuser. Oper. Theory, Adv. Appl. 114, 131-145 (2000).
Reviewer: P.Dyshlovenko (Ul’yanovsk)
Constructing analytical energy functions for lossless network-reduction power system models: Framework and new developments. (English) Zbl 0949.93061
Reviewer: D.Stanomir (Bucureşti)
Linear algebra for engineers, chemists and natural scientists. 2. verbesserte Aufl. (Lineare Algebra für Ingenieure, Chemiker und Naturwissenschaftler.) (German) Zbl 0954.15003
vdf Vorlesungsskripte. Zürich: vdf Hochschulverlag an der ETH Zürich. vi, 151 p. (1999).
Reviewer: Peter Reichensperger (Oberasbach)
Positivity of block tridiagonal matrices. (English) Zbl 0921.39004
Reviewer: Narcisa C. Apreutesei (Iaşi)
On the upper bound for the positive integer solutions of the system of diophantine equations \(x^2-7y^2=2\), \(z^2-32y^2=-23\). (Chinese. English summary) Zbl 0922.11022
Reviewer: Le Maohua (Zhanjiang)
On the global analysis of planar quadratic vector fields. (English) Zbl 0910.34044
Reviewer: Huaiping Zhu (Montreal)
A polynomial approach to linear algebra. (English) Zbl 0852.15001
New York, NY: Springer. xiii, 360 p. (1996).
Reviewer: H.-J.Kowalsky (Braunschweig)
Filter Results by …
Document Type
- Journal Articles (145)
- Collection Articles (12)
- Books (11)
all
top 5
Author
- Filipin, Alan (4)
- Fujita, Yasutsugu (4)
- Schlomiuk, Dana I. (4)
- Togbé, Alain (4)
- Ferragut, Antoni (3)
- Kulyk, V. L. (3)
- Leep, David B. (3)
- Llibre, Jaume (3)
- Marshall, Murray Angus (3)
- Nokhodkar, Amir Hossein (3)
- Šimon Hilscher, Roman (3)
- Vulpe, Nicolae I. (3)
- Bayer-Fluckiger, Eva (2)
- Becher, Karim Johannes (2)
- Benner, Peter (2)
- Chen, Guanrong (2)
- Chen, Yufu (2)
- Degoli, Lando (2)
- Dixmier, Jacques (2)
- Gromak, Valeriĭ Ivanovich (2)
- Guo, Laigang (2)
- Han, Maoan (2)
- Ionaşcu, Eugen Julien (2)
- Kaneko, Osamu (2)
- Kratz, Werner (2)
- Luca, Florian (2)
- Matsuda, Kazuhide (2)
- Mehrmann, Volker (2)
- Mytropol’skyĭ, Yuriĭ Oleksiĭovych (2)
- Miyazaki, Takafumi (2)
- Ovsienko, Sergei A. (2)
- Popa, Mihail N. (2)
- Rapisarda, Paolo (2)
- Rihane, Salah Eddine (2)
- Szabo, Fred (2)
- Tian, Jinghuang (2)
- Trentelman, Harry L. (2)
- Tsegel’nik, V. V. (2)
- Valls Anglés, Cláudia (2)
- Yu, Pei (2)
- Zeidan, Vera Michel (2)
- Abou-Kandil, Hisham (1)
- Adédji, Kouèssi Norbert (1)
- Adžaga, Nikola (1)
- Akivis, Maks A. (1)
- Alberich-Carramiñana, Maria (1)
- Artés, Joan Carles (1)
- Ateiwi, Ali Mahmud (1)
- Baćić, Ljubica (1)
- Bácsi, Ádám (1)
- Bai, Zhaojun (1)
- Bartyshev, A. V. (1)
- Belkin, Mikhail (1)
- Belov, Vladimir Vasilyevich (1)
- Belozyorov, Vasiliy Ye. (1)
- Bingöl, Fatma Kader (1)
- Blatter, Christian (1)
- Bohner, Martin J. (1)
- Borcherds, Richard Ewen (1)
- Burdujan, Ilie (1)
- Cairó, Laurent (1)
- Castro, Jocelyn A. (1)
- Chaubey, Sneha (1)
- Chavarriga, Javier (1)
- Chen, Guangdi (1)
- Chen, Zhiyun (1)
- Cheng, Daizhan (1)
- Chiang, Hsiao-Dong (1)
- Chicone, Carmen C. (1)
- Christopher, Colin J. (1)
- Chu, Chia-Chi (1)
- Cipu, Mihai (1)
- Costello, Patrick J. (1)
- Cotsakis, Spiros (1)
- Danset, Renaud (1)
- Dell’Antonio, Gian Fausto (1)
- Diaconescu, Oxana Cerba (1)
- Dickson, Leonard Eugene (1)
- Dobrokhotov, O. S. (1)
- Dobrokhotov, Sergei Yurievich (1)
- Došlý, Ondřej (1)
- Dřímalová, Iva (1)
- Easley, Robert F. (1)
- Fang, Xiaoniu (1)
- Feix, Marc Roy (1)
- Figari, Rodolfo (1)
- Fincke, Ulrich (1)
- First, Uriya A. (1)
- Flessas, George P. (1)
- Fuchs, Elena D. (1)
- Fuhrmann, Paul A. (1)
- Fujii, Takao (1)
- Fujiwara, Masahiko (1)
- Gaiko, Valery A. (1)
- García-Saldaña, Johanna D. (1)
- Ge, JuHong (1)
- Giacomini, Hector J. (1)
- Golpar-Raboky, Effat (1)
- Golub, Gene Howard (1)
- Górnisiewicz, Krzysztof (1)
- and 124 more Authors
all
top 5
Serial
- Int. J. Bifurcation Chaos Appl. Sci. Eng. (6)
- Math. Notes (3)
- Differ. Equations (3)
- J. Reine Angew. Math. (3)
- Trans. Am. Math. Soc. (3)
- Syst. Control Lett. (3)
- Bull. Belg. Math. Soc. - Simon Stevin (3)
- Int. J. Number Theory (3)
- J. Math. Anal. Appl. (2)
- Ukr. Mat. Zh. (2)
- Acta Arith. (2)
- Adv. Math. (2)
- Am. J. Math. (2)
- Appl. Math. Comput. (2)
- Math. Z. (2)
- Pac. J. Math. (2)
- Proc. Am. Math. Soc. (2)
- Proc. Japan Acad., Ser. A (2)
- Sov. Math., Dokl. (2)
- J. Syst. Sci. Math. Sci. (2)
- Enseign. Math. (2) (2)
- C. R. Acad. Sci., Paris, Sér. I (2)
- Qual. Theory Dyn. Syst. (2)
- Dyn. Syst. (2)
- ROMAI J. (2)
- Acta Cient. Venez. (1)
- Bull. Aust. Math. Soc. (1)
- Commun. Algebra (1)
- Dokl. Akad. Nauk Ukr. SSR, Ser. A (1)
- J. Franklin Inst. (1)
- Lett. Math. Phys. (1)
- Rep. Math. Phys. (1)
- Rocky Mt. J. Math. (1)
- Ukr. Math. J. (1)
- Ann. Mat. Pura Appl. (4) (1)
- Automatica (1)
- Bull. Lond. Math. Soc. (1)
- Bull. Soc. Math. Fr. (1)
- Demonstr. Math. (1)
- Differ. Uravn. (1)
- Geom. Dedicata (1)
- J. Algebra (1)
- J. Differ. Equations (1)
- J. Number Theory (1)
- J. Pure Appl. Algebra (1)
- Math. Ann. (1)
- Math. Nachr. (1)
- Math. Rev. Anal. Numér. Théor. Approximation, Math. (1)
- Math. Scand. (1)
- Math. USSR, Izv. (1)
- Monatsh. Math. (1)
- Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods (1)
- Proc. Lond. Math. Soc. (3) (1)
- Publ. Inst. Math., Nouv. Sér. (1)
- Publ. Math. Debr. (1)
- Publ. Res. Inst. Math. Sci. (1)
- SIAM J. Comput. (1)
- SIAM J. Control Optim. (1)
- Soobshch. Akad. Nauk Gruz. SSR (1)
- J. Algorithms (1)
- J. Sichuan Univ., Nat. Sci. Ed. (1)
- J. Zhejiang Univ. (1)
- Circuits Syst. Signal Process. (1)
- Chin. Ann. Math., Ser. B (1)
- J. Nanjing Univ., Math. Biq. (1)
- J. Symb. Comput. (1)
- Ann. Differ. Equations (1)
- Appl. Math. Lett. (1)
- Math. Comput. Modelling (1)
- SIAM J. Discrete Math. (1)
- SIAM J. Matrix Anal. Appl. (1)
- J. Cent. China Norm. Univ., Nat. Sci. (1)
- J. Ramanujan Math. Soc. (1)
- Geom. Funct. Anal. (1)
- Linear Algebra Appl. (1)
- Proc. R. Soc. Edinb., Sect. A, Math. (1)
- Proc. R. Soc. Lond., Ser. A (1)
- SIAM Rev. (1)
- Ann. Inst. Henri Poincaré, Probab. Stat. (1)
- J. Dyn. Differ. Equations (1)
- An. Științ. Univ. Al. I. Cuza Iași, Ser. Nouă, Mat. (1)
- SIAM J. Sci. Comput. (1)
- J. Fractional Calc. (1)
- Tr. Semin. Vektorn. Tenzorn. Anal. (1)
- Rad Hrvat. Akad. Znan. Umjet., Mat. Znan. (1)
- Adv. Comput. Math. (1)
- Notes Number Theory Discrete Math. (1)
- Bol. Soc. Mat. Mex., III. Ser. (1)
- J. Geod. (1)
- An. Științ. Univ. “Ovidius” Constanța, Ser. Mat. (1)
- Doc. Math. (1)
- Electron. J. Linear Algebra (1)
- Ramanujan J. (1)
- Differ. Equ. Dyn. Syst. (1)
- Vietnam J. Math. (1)
- Optim. Methods Softw. (1)
- Analysis, München (1)
- J. Eur. Math. Soc. (JEMS) (1)
- Acta Math. Sin., Engl. Ser. (1)
- J. Dyn. Control Syst. (1)
- and 14 more Serials
all
top 5
Year of Publication
- 2024 (3)
- 2023 (1)
- 2022 (4)
- 2021 (5)
- 2020 (5)
- 2019 (8)
- 2018 (8)
- 2017 (2)
- 2016 (2)
- 2015 (7)
- 2014 (3)
- 2013 (6)
- 2012 (2)
- 2011 (1)
- 2010 (7)
- 2009 (1)
- 2008 (3)
- 2007 (2)
- 2006 (2)
- 2004 (4)
- 2003 (5)
- 2002 (2)
- 2001 (4)
- 2000 (5)
- 1999 (2)
- 1998 (1)
- 1997 (4)
- 1996 (2)
- 1995 (4)
- 1994 (3)
- 1992 (1)
- 1991 (4)
- 1990 (1)
- 1989 (6)
- 1988 (5)
- 1987 (6)
- 1986 (3)
- 1985 (4)
- 1984 (7)
- 1983 (3)
- 1982 (6)
- 1981 (1)
- 1980 (2)
- 1979 (3)
- 1978 (1)
- 1977 (2)
- 1976 (1)
- 1914 (1)
- 1900 (1)
- 1874 (1)
- 1873 (1)
all
top 3
Main Field
- 11-XX (67)
- 34-XX (59)
- 15-XX (38)
- 37-XX (26)
- 93-XX (15)
- 65-XX (12)
- 14-XX (8)
- 17-XX (8)
- 12-XX (7)
- 52-XX (7)
- 68-XX (7)
- 16-XX (6)
- 35-XX (6)
- 49-XX (6)
- 51-XX (6)
- 70-XX (5)
- 05-XX (4)
- 20-XX (4)
- 26-XX (4)
- 39-XX (4)
- 94-XX (4)
- 47-XX (3)
- 53-XX (3)
- 81-XX (3)
- 91-XX (3)
- 30-XX (2)
- 46-XX (2)
- 58-XX (2)
- 60-XX (2)
- 62-XX (2)
- 00-XX (1)
- 03-XX (1)
- 22-XX (1)
- 45-XX (1)
- 57-XX (1)
- 86-XX (1)
- 90-XX (1)
- 97-XX (1)
