Analiza functionala si teorie spectrala

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Probleme propuse si probleme nerezolvate

Last post by Dragos Fratila « Sat Feb 02, 2008 1:01 pm
Replies: 2
by Liviu Paunescu » Wed Jan 16, 2008 7:07 pm

2 Replies

1195 Views

Last post by Dragos Fratila
Sat Feb 02, 2008 1:01 pm

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Intrebare

Last post by Dragos Fratila « Wed Jun 09, 2010 8:08 pm
Replies: 1
by Beniamin Bogosel » Tue Jun 08, 2010 8:17 pm

1 Replies

628 Views

Last post by Dragos Fratila
Wed Jun 09, 2010 8:08 pm
Predualul unui spatiu Banach

Last post by Cristi « Thu Apr 22, 2010 9:21 pm
Replies: 1
by Liviu Paunescu » Wed Nov 21, 2007 10:52 pm

1 Replies

896 Views

Last post by Cristi
Thu Apr 22, 2010 9:21 pm
Convergenta punctuala

Last post by Liviu Paunescu « Mon Oct 27, 2008 10:30 pm
Replies: 1
by dede » Mon Oct 27, 2008 7:39 pm

1 Replies

1232 Views

Last post by Liviu Paunescu
Mon Oct 27, 2008 10:30 pm
IMC 2008 ziua 2 problema 6

Last post by Beniamin Bogosel « Wed Jul 30, 2008 2:03 pm

by Beniamin Bogosel » Wed Jul 30, 2008 2:03 pm

0 Replies

744 Views

Last post by Beniamin Bogosel
Wed Jul 30, 2008 2:03 pm
factori neizomorfi

Last post by Dragos Fratila « Tue Jul 29, 2008 10:45 pm

by Dragos Fratila » Tue Jul 29, 2008 10:45 pm

0 Replies

591 Views

Last post by Dragos Fratila
Tue Jul 29, 2008 10:45 pm
Vector ciclic si vector separator implica vector biciclic

Last post by Dragos Fratila « Fri Jul 18, 2008 8:14 am

by Dragos Fratila » Fri Jul 18, 2008 8:14 am

0 Replies

675 Views

Last post by Dragos Fratila
Fri Jul 18, 2008 8:14 am
Curba intr-un spatiu Hilbert nicaieri "derivabila"

Last post by aleph « Sat Apr 26, 2008 1:14 am
Replies: 5
by Dragos Fratila » Thu Apr 17, 2008 11:14 am

5 Replies

2555 Views

Last post by aleph
Sat Apr 26, 2008 1:14 am
Izomorfism de spatii?

Last post by Alexandru Chirvasitu « Wed Apr 23, 2008 7:28 pm
Replies: 1
by Theliro » Wed Apr 23, 2008 1:35 pm

1 Replies

1063 Views

Last post by Alexandru Chirvasitu
Wed Apr 23, 2008 7:28 pm
Un fel de Th Nielsen-Schreier pt algebre grupale von Neumann

Last post by Dragos Fratila « Wed Apr 23, 2008 10:44 am

by Dragos Fratila » Wed Apr 23, 2008 10:44 am

0 Replies

841 Views

Last post by Dragos Fratila
Wed Apr 23, 2008 10:44 am
descompunere polara "libera"

Last post by Dragos Fratila « Tue Apr 22, 2008 8:57 pm

by Dragos Fratila » Tue Apr 22, 2008 8:57 pm

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660 Views

Last post by Dragos Fratila
Tue Apr 22, 2008 8:57 pm
rafinare a inegalitatii lui Wirtinger intr-un spatiu Hilbert

Last post by Cezar Lupu « Fri Apr 11, 2008 2:32 am

by Cezar Lupu » Fri Apr 11, 2008 2:32 am

0 Replies

802 Views

Last post by Cezar Lupu
Fri Apr 11, 2008 2:32 am
C*-algebre comutative

Last post by Liviu Paunescu « Tue Mar 04, 2008 11:05 pm
Replies: 3
by Liviu Paunescu » Sun Feb 17, 2008 9:45 pm

3 Replies

1376 Views

Last post by Liviu Paunescu
Tue Mar 04, 2008 11:05 pm
In legatura cu "proiectii"

Last post by Consonant « Thu Feb 07, 2008 9:07 pm

by Consonant » Thu Feb 07, 2008 9:07 pm

0 Replies

827 Views

Last post by Consonant
Thu Feb 07, 2008 9:07 pm
Proiectii

Last post by Consonant « Sun Feb 03, 2008 11:34 am
Replies: 9
by Liviu Paunescu » Wed Dec 05, 2007 11:09 pm

9 Replies

2544 Views

Last post by Consonant
Sun Feb 03, 2008 11:34 am
Suma de subspatii inchise = dens, dar nu inchis

Last post by aleph « Sat Feb 02, 2008 10:26 pm
Replies: 1
by Dragos Fratila » Thu Jan 31, 2008 10:25 am

1 Replies

861 Views

Last post by aleph
Sat Feb 02, 2008 10:26 pm
Proiectii si strict convexitate

Last post by Theliro « Thu Jan 31, 2008 9:56 pm
Replies: 2
by Theliro » Tue Jan 29, 2008 12:12 pm

2 Replies

1071 Views

Last post by Theliro
Thu Jan 31, 2008 9:56 pm
Algebra von Neumann comutativa pe un spatiu Hilbert

Last post by Cezar Lupu « Wed Jan 30, 2008 3:26 am

by Cezar Lupu » Wed Jan 30, 2008 3:26 am

0 Replies

1018 Views

Last post by Cezar Lupu
Wed Jan 30, 2008 3:26 am
Functii operatorial monotone

Last post by Dragos Fratila « Sat Jan 26, 2008 9:53 pm
Replies: 5
by Dragos Fratila » Sat Jan 12, 2008 3:15 pm

5 Replies

1707 Views

Last post by Dragos Fratila
Sat Jan 26, 2008 9:53 pm
Aplicatii liniare din L^p cu p<1

Last post by Alexandru Chirvasitu « Sat Jan 26, 2008 6:33 pm
Replies: 1
by Dragos Fratila » Sat Jan 26, 2008 5:31 pm

1 Replies

985 Views

Last post by Alexandru Chirvasitu
Sat Jan 26, 2008 6:33 pm
Calcul functional borelian - norma

Last post by Liviu Paunescu « Sun Jan 20, 2008 9:02 pm
Replies: 1
by Liviu Paunescu » Sat Jan 12, 2008 4:05 pm

1 Replies

1077 Views

Last post by Liviu Paunescu
Sun Jan 20, 2008 9:02 pm
Dilatarea unei contractii la un unitar

Last post by Alexandru Chirvasitu « Wed Jan 16, 2008 7:53 pm
Replies: 4
by Liviu Paunescu » Sat Jan 12, 2008 3:05 pm

4 Replies

1340 Views

Last post by Alexandru Chirvasitu
Wed Jan 16, 2008 7:53 pm
Vector ciclic in l_1

Last post by Consonant « Mon Jan 14, 2008 11:01 am
Replies: 2
by Consonant » Sun Jan 13, 2008 7:05 pm

2 Replies

1024 Views

Last post by Consonant
Mon Jan 14, 2008 11:01 am
Orice spatiu prehilbertian are o baza ortonormala

Last post by Consonant « Sun Jan 13, 2008 12:20 am
Replies: 8
by Cezar Lupu » Mon Dec 10, 2007 5:35 am

8 Replies

2382 Views

Last post by Consonant
Sun Jan 13, 2008 12:20 am
Pentru orice operator din B(H) avem Ker(x*)=Ran(x)^{_|_}

Last post by Dragos Fratila « Sat Jan 12, 2008 7:48 pm
Replies: 1
by Cezar Lupu » Thu Nov 08, 2007 1:28 am

1 Replies

1140 Views

Last post by Dragos Fratila
Sat Jan 12, 2008 7:48 pm
Spatiu normat Baire

Last post by Alexandru Chirvasitu « Sat Jan 12, 2008 6:13 pm
Replies: 1
by aleph » Sat Jan 12, 2008 10:06 am

1 Replies

947 Views

Last post by Alexandru Chirvasitu
Sat Jan 12, 2008 6:13 pm
Teorema Fuglede-Putnam-Rosenbaum

Last post by Consonant « Sat Jan 12, 2008 5:24 am
Replies: 1
by Cezar Lupu » Mon Oct 15, 2007 9:56 pm

1 Replies

1632 Views

Last post by Consonant
Sat Jan 12, 2008 5:24 am
Operator compact inversabil

Last post by aleph « Fri Jan 11, 2008 9:00 pm
Replies: 1
by Gelfand Valentin » Thu Sep 27, 2007 7:33 pm

1 Replies

1127 Views

Last post by aleph
Fri Jan 11, 2008 9:00 pm
Convergenta slaba

Last post by Consonant « Fri Jan 11, 2008 5:22 pm
Replies: 2
by Consonant » Thu Jan 10, 2008 5:32 pm

2 Replies

1473 Views

Last post by Consonant
Fri Jan 11, 2008 5:22 pm
Radical din operatori pozitivi

Last post by Consonant « Fri Jan 11, 2008 4:51 pm
Replies: 6
by Liviu Paunescu » Wed Sep 26, 2007 11:00 pm

6 Replies

2575 Views

Last post by Consonant
Fri Jan 11, 2008 4:51 pm
l_1 e spatiu Banach

Last post by Liviu Paunescu « Fri Jan 11, 2008 2:58 pm
Replies: 4
by Dragos Fratila » Thu Oct 04, 2007 11:18 pm

4 Replies

1678 Views

Last post by Liviu Paunescu
Fri Jan 11, 2008 2:58 pm
Operatie pe multimea operat. liniari, marginiti si pozitivi

Last post by Consonant « Sun Jan 06, 2008 8:36 pm
Replies: 3
by Dragos Fratila » Thu Oct 25, 2007 11:14 am

3 Replies

1270 Views

Last post by Consonant
Sun Jan 06, 2008 8:36 pm
Operatorul "urma" pe B(H)

Last post by Consonant « Sun Dec 30, 2007 10:57 am
Replies: 1
by Cezar Lupu » Mon Dec 10, 2007 4:25 am

1 Replies

904 Views

Last post by Consonant
Sun Dec 30, 2007 10:57 am
Matrice si convergenta slaba

Last post by Alexandru Chirvasitu « Mon Dec 10, 2007 10:51 pm
Replies: 2
by Iulian » Mon Dec 10, 2007 6:30 pm

2 Replies

1041 Views

Last post by Alexandru Chirvasitu
Mon Dec 10, 2007 10:51 pm
Factori liberi

Last post by Iulian « Mon Dec 10, 2007 6:23 pm

by Iulian » Mon Dec 10, 2007 6:23 pm

0 Replies

687 Views

Last post by Iulian
Mon Dec 10, 2007 6:23 pm
Grupoizi si algebre

Last post by Iulian « Mon Dec 10, 2007 6:17 pm

by Iulian » Mon Dec 10, 2007 6:17 pm

0 Replies

679 Views

Last post by Iulian
Mon Dec 10, 2007 6:17 pm
Norma operatorilor normali :)

Last post by Cezar Lupu « Thu Nov 08, 2007 1:23 am
Replies: 5
by Liviu Paunescu » Thu Sep 27, 2007 8:02 pm

5 Replies

1661 Views

Last post by Cezar Lupu
Thu Nov 08, 2007 1:23 am
Spatiu prehilbertian real si module egale

Last post by Cezar Lupu « Sun Nov 04, 2007 8:17 pm

by Cezar Lupu » Sun Nov 04, 2007 8:17 pm

0 Replies

829 Views

Last post by Cezar Lupu
Sun Nov 04, 2007 8:17 pm
Teorema Kaplansky de caracterizare a C*-algebrelor necomut.

Last post by Cezar Lupu « Tue Oct 23, 2007 12:49 am

by Cezar Lupu » Tue Oct 23, 2007 12:49 am

0 Replies

889 Views

Last post by Cezar Lupu
Tue Oct 23, 2007 12:49 am
C*-algebra si zz*<=0, atunci z=0

Last post by Cezar Lupu « Mon Oct 15, 2007 9:38 pm

by Cezar Lupu » Mon Oct 15, 2007 9:38 pm

0 Replies

1374 Views

Last post by Cezar Lupu
Mon Oct 15, 2007 9:38 pm
O problema de tip Hahn-Banach 2

Last post by Dragos Fratila « Thu Oct 04, 2007 11:15 pm
Replies: 1
by Cezar Lupu » Wed Oct 03, 2007 11:56 pm

1 Replies

923 Views

Last post by Dragos Fratila
Thu Oct 04, 2007 11:15 pm
O problema de tip Hahn-Banach 1

Last post by Cezar Lupu « Wed Oct 03, 2007 11:49 pm

by Cezar Lupu » Wed Oct 03, 2007 11:49 pm

0 Replies

923 Views

Last post by Cezar Lupu
Wed Oct 03, 2007 11:49 pm
Hahn-Banach

Last post by Alin Galatan « Tue Oct 02, 2007 1:14 am
Replies: 1
by Cezar Lupu » Sun Sep 30, 2007 7:22 pm

1 Replies

1050 Views

Last post by Alin Galatan
Tue Oct 02, 2007 1:14 am

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