Collatz, L. Approximation by functions of fewer variables. (English) Zbl 0249.41020 Conf. Theory ordinary partial diff. Equ., Dundee/Scotland 1972, Lect. Notes Math. 280, 16-31 (1972). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents MSC: 41A63 Multidimensional problems 35-XX Partial differential equations 45-XX Integral equations × Cite Format Result Cite Review PDF