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math-ph2004
Estimates for first-order homogeneous linear characteristic problems
Simonetta Frittelli
An algebraic criterion that is sufficient to establish the existence of certain a priori estimates for the solution of first-order homogeneous linear characteristic problems is der…
math-ph2004
Estimates for the characteristic problem of the first-order reduction of the wave equation
Simonetta Frittelli
We calculate certain estimates for the solution of the characteristic problem of the wave equation reduced to first order, in terms of the free data prescribed on two transverse su…