Absolute upper bounds for ππ scattering

M. Froissart:Phys. Rev.,123, 1053 (1961).

A. Martin:Nuovo Cimento,42, 930 (1966).

Y. Jin andA. Martin:Phys. Rev.,135, B 1375 (1964).

Seee.g. G. Chew andS. Mandelstam:Phys. Rev.,119, 978 (1960).

SeeA. Martin: inProceedings of Trieste Conference (1965). A detailed proof has been given byS. Aks:Journ. Math. Phys.,6, 516 (1965).

A. Martin: Stanford University preprint (August 1964), see also ref. (5).

G. Wanders:Phys. Lett.,19, 331 (1965).

See ref. (2).

L. Łukaszuk:Nuovo Cimento,51 A, 67 (1966).

SeeE. C. Titchmarsh:The Theory of Functions (Oxford, 1939), p. 167.