Dieckmann, Gregor Korovkin theory in liminal JB-algebras. (English) Zbl 0904.46040 Math. Scand. 81, No. 2, 269-282 (1997). Reviewer: G.Dieckmann (Walldorf) MSC: 46H70 47A58 41A36 × Cite Format Result Cite Review PDF Full Text: DOI EuDML
Pannenberg, M. Approximate regularity of commutative Beurling algebras and Korovkin approximation. (English) Zbl 0765.46038 Monatsh. Math. 113, No. 4, 275-310 (1992). Reviewer: M.Pannenberg (Köln) MSC: 46J05 43A15 41A36 × Cite Format Result Cite Review PDF Full Text: DOI EuDML
Pannenberg, Michael Finite universal Korovkin systems in tensor products of commutative Banach algebras. (English) Zbl 0764.46052 Rend. Circ. Mat. Palermo, II. Ser. 40, No. 2, 215-240 (1991). Reviewer: M.Fritzsche (Potsdam) MSC: 46J10 46M05 41A65 46J05 × Cite Format Result Cite Review PDF Full Text: DOI
Pannenberg, Michael A new look at Korovkin’s second theorem. (English) Zbl 0696.41019 Expo. Math. 8, No. 1, 91-96 (1990). Reviewer: M.Pannenberg MSC: 41A36 43A25 43A99 × Cite Format Result Cite Review PDF
Pannenberg, Michael A characterization of a class of locally compact abelian groups via Korovkin theory. (English) Zbl 0682.22005 Math. Z. 204, No. 3, 451-464 (1990). Reviewer: M.Pannenberg MSC: 22B10 43A20 43A40 × Cite Format Result Cite Review PDF Full Text: DOI EuDML
Pannenberg, Michael Topics in qualitative Korovkin approximation. (English) Zbl 0677.46046 Conf. Semin. Mat. Univ. Bari 226, 31 p. (1988). MSC: 46L05 41A36 46B42 46E40 46A55 × Cite Format Result Cite Review PDF
Pannenberg, M. A characterization of C(X) among algebras on planar sets by the existence of a finite universal Korovkin system. (English) Zbl 0608.41022 Math. Ann. 277, 785-792 (1987). MSC: 41A65 41A36 32A38 32E30 32E20 × Cite Format Result Cite Review PDF Full Text: DOI EuDML
Pannenberg, Michael Korovkin approximation in Waelbroeck algebras. (English) Zbl 0576.41014 Math. Ann. 274, 423-437 (1986). MSC: 41A36 41A65 × Cite Format Result Cite Review PDF Full Text: DOI EuDML
Wolff, M. On the universal Korovkin closure of subsets in vector lattices. (English) Zbl 0392.41017 J. Approximation Theory 22, 243-253 (1978). MSC: 41A65 41A35 46A40 × Cite Format Result Cite Review PDF Full Text: DOI