"Open envelope" diagram 109 110
Analytic continuation by contour deformation 99—100
Analyticity domain of a diagram 19—21
Anomalous threshold 5 81 128—132
Anti-Euclidean vectors 30
Anti-nucleon-nucleon scattering 62 84—85
Box diagram 107 121 132
Compact set of lines and vertices 46
Conjugate norms 54
Conjugate quadratic forms 26
Cutkosky rules 120
Cutkosky rules in the presence of an anomalous threshold 128
Diagram, disconnected 15
Diagram, strongly connected 39
Diagram, strongly connected, weakly connected 39
Diagram, topological properties 45—48
Diagrams, involving pions 67—70
Diagrams, irreducible 69
Diagrams, primitive 45 48 50—53 68—69
Dispersion relations 86—87 92—94
Dispersion relations for partial wave amplitudes 88—89
Divergent diagrams 20—21 135
Domain of analyticity of a diagram 19—21
Domain of holomorphy 79 85—86 96
Electromagnetic structure of the nucleon 59 72
Euclidean momenta 21
Euclidean region 22—23
Extremal property of quadratic form of a diagram 24—27
Feynman amplitude 14—18
Graph 12
Incidence matrix 13
Intermediate state 80
| Kaellen — Lehmann representation 48 137
Landau equations 98—99 103
Linear postulates 1
Majorization principle 40
Mandelstam representation 6 132—134
Mandelstam variables 12 22
Meson-nucleon scattering 53 63—67 90—92
Meson-nucleon scattering, dispersion relations 92—94
Nakanishi representation for NN scattering 89—90
Nakanishi representation for the vertex part 77—79
Norm 53—54
Normal threshold 50 80
Nucleon polygon 40 45 47
Nucleon self-energy 48 134—138
Nucleon-nucleon scattering 51—53 60—63 82—85
Nucleon-nucleon scattering, dispersion relations 86—89
Path 45
Pion-nucleon vertex 68—69 79
Pole type singularities 39
Pole type singularities of the box diagram 132
Primitive diagrams 45 48 50—53 68—69
Proper singularities 9 103
Quadratic form  of a diagram 17—19
Real momenta 21
Renormalized expression for a divergent diagram 21 134—135
Scattering matrix 1
Self-energy diagram 48 134—138
Strong interactions 1
Surface of singularities of a diagram 103
Surface of singularities of the pion-nucleon vertex part 113—115
Surface of singularities of the tetrahedron diagram 110—113
Symanzik theorem 57
Tadpole 13 19
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