. "2"^^ . "It is generally believed that the ground state of the ferromagnetic Heisenberg-Dirac-Van Vleck Hamiltonians acting on s = 1/2 spins of a lattice with N sites has the maximum 2 possible value of the total spin S = N/2 and is N + 1 times degenerate. We present a rigorous proof of this statement, independent of the lattice dimension and topology"@en . . . . . "Dittrich, Jaroslav" . "1"^^ . "On the ground state of ferromagnetic Hamiltonians" . "It is generally believed that the ground state of the ferromagnetic Heisenberg-Dirac-Van Vleck Hamiltonians acting on s = 1/2 spins of a lattice with N sites has the maximum 2 possible value of the total spin S = N/2 and is N + 1 times degenerate. We present a rigorous proof of this statement, independent of the lattice dimension and topology" . "7" . . . "775;779" . "P(KSK1010104)" . "Czechoslovak Journal of Physics" . . "Obecn\u011B se v\u011B\u0159\u00ED, \u017Ee z\u00E1kladn\u00ED stav feromagnetick\u00E9ho Heisenbergova-Diracova-Van Vleckova Hamiltonianu p\u016Fsob\u00EDc\u00EDho na m\u0159\u00ED\u017Ei spinu 1/2 s N vrcholy m\u00E1 maxim\u00E1ln\u00ED mo\u017Enou hodnotu celkov\u00E9ho spinu S = N/2 a je N + 1 kr\u00E1t degenerovan\u00FD. Zde pod\u00E1v\u00E1me rigosn\u00ED d\u016Fkaz tohoto tvrzen\u00ED, nez\u00E1visl\u00FD na dimensi a topologii m\u0159\u00ED\u017Ee"@cs . "O z\u00E1kladn\u00EDm stavu feromagnetick\u00FDch hamiltoni\u00E1n?"@cs . "spin lattice;ferromagnet;ground state"@en . "[00F528065F05]" . "577883" . . "5"^^ . . . "On the ground state of ferromagnetic Hamiltonians" . "On the ground state of ferromagnetic Hamiltonians"@en . "Inozemtsev, V. I." . . "On the ground state of ferromagnetic Hamiltonians"@en . . . "RIV/61389005:_____/04:00105576!RIV/2005/AV0/A49005/N" . "O z\u00E1kladn\u00EDm stavu feromagnetick\u00FDch hamiltoni\u00E1n?"@cs . "RIV/61389005:_____/04:00105576" . . "CZ - \u010Cesk\u00E1 republika" . "0011-4626" . "54" .