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Maximum and antimaximum principles for a second order differential operator with variable coefficients of indefinite sign.
Robert Hakl
Pedro J. Torres
Published in:
Appl. Math. Comput. (2011)
Keyphrases
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differential operators
vector field
multiscale
partial differential equations
multiple scales
scale space
wavelet coefficients
gaussian derivatives
zero crossing
basis functions
feature detectors
higher order