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1 Blockspin arrangement in two dimensions 910
1 Behavior of fields subject to the blockspin
3 Notation for blocks after L stages
2 other sections not shown
analytical Appendix APPROACH TO INSTANTONS arbitrary block-field block-spin constraint block-spin kernel block-spin transformation calculation computations continuum action continuum fields continuum instanton continuum limit difference equations discrete dissertation evaluation field j>n Figure first-order fixed fixed-point action function gradient expansion Heisenberg model higher order i i i i i i Improved Formalism initial lattice initial theory inside the block instanton configuration instanton physics INSTANTONS IN LATTICE interpolating fields Ising model iteration known quantities Laplacian lattice action lattice field lattice gauge theory lattice method lattice spacing lattice theory linear lowest order fields matrix minimum non-linear constraint non-linear sigma model order in a/p order term ordinary instanton packet physical cut-off Point Action powers of a/p quantum mechanical renormalization group transformation result running action scale invariance second order semi-classical solution stage topological properties two-dimensional typical wavelength vacuum vacuum energy vacuum expectation values variables