Abstract
In applying approximation theory to differential and integral equations one gets very often unusual types of approximation problems even in simple cases, especially one gets free approximation problems and field approximation of different levels.
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© 1974 Springer-Verlag Berlin · Heidelberg
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Collatz, L. (1974). Field approximation and free approximation for differential equations. In: Garnir, H.G., Unni, K.R., Williamson, J.H. (eds) Functional Analysis and its Applications. Lecture Notes in Mathematics, vol 399. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0063566
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DOI: https://doi.org/10.1007/BFb0063566
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