Algebra

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Matrice de rang 1

Last post by Marius Mainea « Mon Apr 20, 2009 10:31 pm
Replies: 1
by Radu Titiu » Sat Apr 18, 2009 5:55 pm

1 Replies

641 Views

Last post by Marius Mainea
Mon Apr 20, 2009 10:31 pm
ONM Problema 3

Last post by Cosmin Pohoata « Sat Apr 18, 2009 10:52 am
Replies: 1
by Laurian Filip » Mon Apr 13, 2009 2:00 pm

1 Replies

764 Views

Last post by Cosmin Pohoata
Sat Apr 18, 2009 10:52 am
Problema cu 4 matrici

Last post by Beniamin Bogosel « Thu Apr 09, 2009 1:55 pm
Replies: 1
by Laurentiu Tucaa » Thu Apr 09, 2009 1:30 pm

1 Replies

512 Views

Last post by Beniamin Bogosel
Thu Apr 09, 2009 1:55 pm
Problema 4 ONM 2008

Last post by Laurian Filip « Thu Apr 09, 2009 12:25 am
Replies: 4
by Cezar Lupu » Wed Apr 30, 2008 1:51 pm

4 Replies

2115 Views

Last post by Laurian Filip
Thu Apr 09, 2009 12:25 am
Matrice si functii derivabile

Last post by Theodor Munteanu « Wed Apr 08, 2009 6:45 pm

by Theodor Munteanu » Wed Apr 08, 2009 6:45 pm

0 Replies

388 Views

Last post by Theodor Munteanu
Wed Apr 08, 2009 6:45 pm
Matrice cu conditia det(A^3+I)=1

Last post by Laurian Filip « Sun Apr 05, 2009 12:24 pm
Replies: 1
by Cezar Lupu » Fri Nov 02, 2007 6:13 am

1 Replies

707 Views

Last post by Laurian Filip
Sun Apr 05, 2009 12:24 pm
Doua matrice A, B de ordin 2 cu det(A^3+B^3)=1

Last post by Laurian Filip « Sun Apr 05, 2009 9:20 am
Replies: 1
by Cezar Lupu » Thu Nov 01, 2007 10:10 pm

1 Replies

703 Views

Last post by Laurian Filip
Sun Apr 05, 2009 9:20 am
Traian Lalescu 2009, problema 2

Last post by Laurian Filip « Sat Apr 04, 2009 9:57 am

by Laurian Filip » Sat Apr 04, 2009 9:57 am

0 Replies

440 Views

Last post by Laurian Filip
Sat Apr 04, 2009 9:57 am
det(A^3+B^3)+det(A^3-B^3) este dublul unui cub

Last post by bae « Fri Mar 27, 2009 8:12 pm
Replies: 3
by Bogdan Posa » Tue May 20, 2008 10:09 pm

3 Replies

1425 Views

Last post by bae
Fri Mar 27, 2009 8:12 pm
Problemele de la concursul mateforum

Last post by Beniamin Bogosel « Mon Mar 23, 2009 7:10 pm

by Beniamin Bogosel » Mon Mar 23, 2009 7:10 pm

0 Replies

450 Views

Last post by Beniamin Bogosel
Mon Mar 23, 2009 7:10 pm
OJM 2009, Problema 1

Last post by Beniamin Bogosel « Wed Mar 11, 2009 6:15 pm
Replies: 2
by Beniamin Bogosel » Wed Mar 11, 2009 10:00 am

2 Replies

708 Views

Last post by Beniamin Bogosel
Wed Mar 11, 2009 6:15 pm
A se poate scrie ca produs de doua matrice

Last post by turcas « Tue Mar 10, 2009 3:37 pm
Replies: 1
by Radu Titiu » Tue Mar 10, 2009 2:02 pm

1 Replies

594 Views

Last post by turcas
Tue Mar 10, 2009 3:37 pm
Seemous 2009, Problema 4

Last post by Alin Galatan « Sat Mar 07, 2009 10:04 am

by Alin Galatan » Sat Mar 07, 2009 10:04 am

0 Replies

887 Views

Last post by Alin Galatan
Sat Mar 07, 2009 10:04 am
Seemous 2009, Problema 3

Last post by Alin Galatan « Fri Mar 06, 2009 3:54 pm

by Alin Galatan » Fri Mar 06, 2009 3:54 pm

0 Replies

817 Views

Last post by Alin Galatan
Fri Mar 06, 2009 3:54 pm
Matrice cu toate elem 1

Last post by Marius Perianu « Thu Mar 05, 2009 10:53 pm
Replies: 3
by Andrei Ciupan » Thu Mar 05, 2009 5:37 pm

3 Replies

826 Views

Last post by Marius Perianu
Thu Mar 05, 2009 10:53 pm
Matrice cu urmele nule

Last post by dede « Tue Mar 03, 2009 3:33 pm
Replies: 1
by Marius Mainea » Sat Feb 28, 2009 9:56 pm

1 Replies

550 Views

Last post by dede
Tue Mar 03, 2009 3:33 pm
A transpus = adjuncta, atunci are loc inegalitatea

Last post by Marius Mainea « Tue Mar 03, 2009 12:09 am
Replies: 1
by Radu Titiu » Mon Mar 02, 2009 10:27 pm

1 Replies

511 Views

Last post by Marius Mainea
Tue Mar 03, 2009 12:09 am
Matrice 2-potenta

Last post by Ciprian Oprisa « Fri Feb 20, 2009 6:25 pm
Replies: 1
by Marius Mainea » Thu Feb 12, 2009 10:55 pm

1 Replies

556 Views

Last post by Ciprian Oprisa
Fri Feb 20, 2009 6:25 pm
Matrice cu 1, -1.

Last post by turcas « Wed Feb 04, 2009 12:51 pm
Replies: 1
by Andrei Ciupan » Wed Feb 04, 2009 11:48 am

1 Replies

578 Views

Last post by turcas
Wed Feb 04, 2009 12:51 pm
Matrice de rang mic

Last post by Dragos Fratila « Sun Feb 01, 2009 9:11 pm
Replies: 4
by Marius Mainea » Sun Feb 01, 2009 12:05 pm

4 Replies

1210 Views

Last post by Dragos Fratila
Sun Feb 01, 2009 9:11 pm
Calculati puterea unei matrice de ordinul 3

Last post by Tudor Micu « Sun Jan 25, 2009 6:32 pm
Replies: 1
by turcas » Sat Jan 24, 2009 12:02 pm

1 Replies

741 Views

Last post by Tudor Micu
Sun Jan 25, 2009 6:32 pm
Matrice de ordin impar

Last post by Marius Mainea « Sun Jan 25, 2009 1:24 am
Replies: 1
by Andrei Velicu » Sat Jan 24, 2009 4:36 pm

1 Replies

707 Views

Last post by Marius Mainea
Sun Jan 25, 2009 1:24 am
Matrice inversabila

Last post by Marius Mainea « Sun Jan 25, 2009 1:11 am
Replies: 3
by Andrei Velicu » Sat Jan 24, 2009 4:26 pm

3 Replies

1096 Views

Last post by Marius Mainea
Sun Jan 25, 2009 1:11 am
Matrici nilpotente

Last post by Marius Mainea « Mon Dec 22, 2008 7:44 pm
Replies: 1
by Beniamin Bogosel » Thu Aug 07, 2008 9:31 pm

1 Replies

843 Views

Last post by Marius Mainea
Mon Dec 22, 2008 7:44 pm
Matrice de ordinul 2

Last post by Bogdan Posa « Sun Dec 21, 2008 9:08 pm
Replies: 1
by Marius Mainea » Sat Dec 20, 2008 3:48 pm

1 Replies

621 Views

Last post by Bogdan Posa
Sun Dec 21, 2008 9:08 pm
Matrice cu elemente irationale si produs 1 pe fiecare L si C

Last post by Marius Mainea « Sat Dec 20, 2008 4:00 pm
Replies: 1
by verzuiul » Sun Nov 30, 2008 10:04 am

1 Replies

608 Views

Last post by Marius Mainea
Sat Dec 20, 2008 4:00 pm
Ranguri si valori proprii

Last post by Marius Mainea « Fri Dec 19, 2008 12:32 pm
Replies: 1
by Beniamin Bogosel » Thu Aug 07, 2008 9:34 pm

1 Replies

819 Views

Last post by Marius Mainea
Fri Dec 19, 2008 12:32 pm
Cristian Calude, Problema 2.

Last post by Theodor Munteanu « Sun Nov 23, 2008 11:04 pm
Replies: 2
by Laurian Filip » Thu Nov 06, 2008 11:05 pm

2 Replies

993 Views

Last post by Theodor Munteanu
Sun Nov 23, 2008 11:04 pm
Matrice cu determinant 0

Last post by Tudor Micu « Sat Nov 22, 2008 3:47 pm
Replies: 1
by turcas » Sat Nov 22, 2008 1:28 pm

1 Replies

762 Views

Last post by Tudor Micu
Sat Nov 22, 2008 3:47 pm
Matrice cu suma elementelor zero

Last post by Marius Mainea « Sat Nov 22, 2008 1:30 pm
Replies: 1
by Radu Titiu » Sat Nov 08, 2008 3:12 pm

1 Replies

726 Views

Last post by Marius Mainea
Sat Nov 22, 2008 1:30 pm
Matrice "transformata"

Last post by Beniamin Bogosel « Sat Nov 08, 2008 7:58 pm
Replies: 1
by Radu Titiu » Sat Nov 08, 2008 3:10 pm

1 Replies

657 Views

Last post by Beniamin Bogosel
Sat Nov 08, 2008 7:58 pm
O intrebare cu o permutare

Last post by Beniamin Bogosel « Thu Oct 16, 2008 8:56 pm
Replies: 1
by Mircea Cimpoeas » Wed Oct 15, 2008 9:52 pm

1 Replies

649 Views

Last post by Beniamin Bogosel
Thu Oct 16, 2008 8:56 pm
Concurs "Teodor Topan" - problema 3

Last post by Tudor Micu « Thu Jul 31, 2008 5:14 pm
Replies: 1
by maky » Mon Dec 03, 2007 2:12 pm

1 Replies

983 Views

Last post by Tudor Micu
Thu Jul 31, 2008 5:14 pm
Suma de matrice hermitiene

Last post by Dragos Fratila « Tue Jul 01, 2008 5:23 pm
Replies: 2
by Dragos Fratila » Tue Jul 01, 2008 11:21 am

2 Replies

1126 Views

Last post by Dragos Fratila
Tue Jul 01, 2008 5:23 pm
Matrice egala cu transpusa sa

Last post by Bogdan Posa « Tue Jun 24, 2008 11:04 pm
Replies: 1
by Marius Mainea » Tue Jun 24, 2008 8:04 pm

1 Replies

876 Views

Last post by Bogdan Posa
Tue Jun 24, 2008 11:04 pm
(AB-BA)^n=O_n

Last post by Sabin Salajan « Fri Jun 20, 2008 11:59 pm
Replies: 3
by Sabin Salajan » Fri Jun 20, 2008 11:59 am

3 Replies

1474 Views

Last post by Sabin Salajan
Fri Jun 20, 2008 11:59 pm
A si B comuta, atunci det(A^2+B^2)>=(detA-detB)^2

Last post by Marius Mainea « Fri Jun 20, 2008 10:30 pm
Replies: 1
by Cezar Lupu » Wed Oct 24, 2007 12:53 am

1 Replies

878 Views

Last post by Marius Mainea
Fri Jun 20, 2008 10:30 pm
Egalitate determinanti pentru matrice de ordin 2

Last post by Marius Mainea « Fri Jun 20, 2008 9:13 pm
Replies: 1
by Cezar Lupu » Wed Nov 07, 2007 1:09 am

1 Replies

729 Views

Last post by Marius Mainea
Fri Jun 20, 2008 9:13 pm
Matrice cu elemente intregi si determinant nenul

Last post by aleph « Fri Jun 20, 2008 8:33 pm
Replies: 2
by Cezar Lupu » Fri Nov 09, 2007 10:49 pm

2 Replies

920 Views

Last post by aleph
Fri Jun 20, 2008 8:33 pm
Matrice inversabile A, B cu proprietatea ca AB=-BA

Last post by Sergiu Moroianu « Fri Jun 20, 2008 3:37 pm
Replies: 4
by Diana Putan » Wed Mar 12, 2008 11:11 pm

4 Replies

1670 Views

Last post by Sergiu Moroianu
Fri Jun 20, 2008 3:37 pm
A matrice rationala cu detA=-2

Last post by Marius Mainea « Fri Jun 20, 2008 3:18 pm
Replies: 1
by Cezar Lupu » Thu Oct 18, 2007 12:36 pm

1 Replies

782 Views

Last post by Marius Mainea
Fri Jun 20, 2008 3:18 pm
Matrice inversabila de ordin 2 cu o conditie

Last post by Marius Mainea « Fri Jun 20, 2008 2:59 pm
Replies: 1
by Cezar Lupu » Sat Oct 13, 2007 12:23 am

1 Replies

891 Views

Last post by Marius Mainea
Fri Jun 20, 2008 2:59 pm
Concurs "Teodor Topan" - problema 2

Last post by heman « Sun Jun 15, 2008 10:57 am
Replies: 1
by maky » Mon Dec 03, 2007 2:11 pm

1 Replies

938 Views

Last post by heman
Sun Jun 15, 2008 10:57 am
O problema cu matrice

Last post by Marius Mainea « Sat Jun 14, 2008 10:50 pm
Replies: 1
by bogdanl_yex » Fri Apr 11, 2008 11:42 am

1 Replies

839 Views

Last post by Marius Mainea
Sat Jun 14, 2008 10:50 pm
Matrice reala cu det-ul si minorii de ordin n-1 rationali

Last post by Marius Mainea « Sat Jun 14, 2008 1:13 pm
Replies: 1
by Bogdan Posa » Tue Mar 18, 2008 11:49 am

1 Replies

797 Views

Last post by Marius Mainea
Sat Jun 14, 2008 1:13 pm
Submultime a unui grup de permutari

Last post by Marius Mainea « Wed Jun 11, 2008 11:16 pm
Replies: 1
by heman » Wed Jun 11, 2008 10:04 pm

1 Replies

737 Views

Last post by Marius Mainea
Wed Jun 11, 2008 11:16 pm
Doua matrice care nu au valori proprii in comun

Last post by Radu Titiu « Tue Jun 10, 2008 10:07 pm
Replies: 1
by Beniamin Bogosel » Mon Jun 02, 2008 3:49 pm

1 Replies

740 Views

Last post by Radu Titiu
Tue Jun 10, 2008 10:07 pm
Matrice binare

Last post by Beniamin Bogosel « Tue Jun 10, 2008 3:00 pm
Replies: 2
by Beniamin Bogosel » Mon Jun 02, 2008 9:25 am

2 Replies

951 Views

Last post by Beniamin Bogosel
Tue Jun 10, 2008 3:00 pm
Subiectul 1, Concursul centrelor de excelenta 2008

Last post by Marius Mainea « Sat Jun 07, 2008 1:42 pm
Replies: 1
by Bogdan Cebere » Sat May 31, 2008 10:07 pm

1 Replies

796 Views

Last post by Marius Mainea
Sat Jun 07, 2008 1:42 pm
Ranguri..

Last post by Beniamin Bogosel « Mon Jun 02, 2008 10:14 pm
Replies: 1
by Beniamin Bogosel » Mon Jun 02, 2008 8:29 pm

1 Replies

785 Views

Last post by Beniamin Bogosel
Mon Jun 02, 2008 10:14 pm

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