PROOF THAT FREE ENERGY OF SPIN SYSTEM IS EXTENSIVE

[1] CONVEX FUNCTIONS [J]. BULLETIN OF THE AMERICAN MATHEMATICAL SOCIETY, 1948, 54 (05) : 439 - 460

[2] BECKENBACH EF, 1961, MODERN MATHEMATICS 2, P5

[3] BELLMAN R, 1960, INTRODUCTION MATRIX, P115

[4] COURANT R, 1962, METHODS MATHEMATICAL, V2, P766

[5] COURANT R, 1936, DIFFERENTIAL INTEGRA, V2, P325

[6] CZERWONKO J, 1959, B ACAD POLON SCI 3, V7, P639

[7] ERDELYI A, 1961, MODERN MATH ENG, P5

[8] PEIERLS VARIATIONAL THEOREM [J]. PHYSICA, 1963, 29 (10): : 1114 - &

[9] VARIATIONAL METHOD FOR QUANTUM STATISTICS OF INTERACTING PARTICLES [J]. JOURNAL OF MATHEMATICAL PHYSICS, 1962, 3 (01) : 131 - &

[10] HARDY GH, 1959, INEQUALITIES, pCH3

[1] CONVEX FUNCTIONS [J]. BULLETIN OF THE AMERICAN MATHEMATICAL SOCIETY, 1948, 54 (05) : 439 - 460

[2] BECKENBACH EF, 1961, MODERN MATHEMATICS 2, P5

[3] BELLMAN R, 1960, INTRODUCTION MATRIX, P115

[4] COURANT R, 1962, METHODS MATHEMATICAL, V2, P766

[5] COURANT R, 1936, DIFFERENTIAL INTEGRA, V2, P325

[6] CZERWONKO J, 1959, B ACAD POLON SCI 3, V7, P639

[7] ERDELYI A, 1961, MODERN MATH ENG, P5

[8] PEIERLS VARIATIONAL THEOREM [J]. PHYSICA, 1963, 29 (10): : 1114 - &

[9] VARIATIONAL METHOD FOR QUANTUM STATISTICS OF INTERACTING PARTICLES [J]. JOURNAL OF MATHEMATICAL PHYSICS, 1962, 3 (01) : 131 - &

[10] HARDY GH, 1959, INEQUALITIES, pCH3