## Found 6,154 Documents (Results 1–100)

100
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### On the Chebyshev center and the nonemptiness of the intersection of nested sets. (English. Russian original)Zbl 07518134

Math. Notes 111, No. 3, 478-483 (2022); translation from Mat. Zametki 111, No. 3, 451-458 (2022).
MSC:  46B20 41A65
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### Approximation by delta-convex mappings in certain spaces. (English)Zbl 07517481

MSC:  41A65 46E40
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### Solarity and connectedness of sets in the space $$C[a,b]$$ and in finite-dimensional polyhedral spaces. (English. Russian original)Zbl 07514273

Sb. Math. 213, No. 2, 268-282 (2022); translation from Mat. Sb. 213, No. 2, 149-166 (2022).
MSC:  41A65
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### A remark on entropy numbers. (English)Zbl 07500267

MSC:  41A65 46B99
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### Best proximity points in noncommutative Banach spaces. (English)Zbl 07490209

MSC:  47H10 41A65 46L52
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### Ball-complete sets and solar properties of sets in asymmetric spaces. (English)Zbl 07490197

MSC:  41A65 46B20 46A19
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### A strong convergence theorem for an iterative method for solving the split variational inequalities in Hilbert spaces. (English)Zbl 07438382

MSC:  41A65 47H17 47H20
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### The order of $$L^1$$-approximation by elements of the disc algebra. (English)Zbl 07438131

MSC:  46E15 30H10 41A65
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### Optimal recovery of operator sequences. (English)Zbl 07509985

MSC:  41A65 46A45
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### Fixed point in semi-linear uniform spaces and convex metric spaces. (English)Zbl 07489026

MSC:  54H25 54E35 41A65
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### On optimal recovery of values of linear operators from information known with a stochastic error. (English. Russian original)Zbl 07480681

Sb. Math. 212, No. 11, 1588-1607 (2021); translation from Mat. Sb. 212, No. 11, 89-108 (2021).
MSC:  41A65
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### On $$k$$-strong convexity in Banach spaces. (English)Zbl 07470574

MSC:  46B20 41A65
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### Approximatively compact sets in asymmetric Efimov-Stechkin spaces and convexity of almost suns. (English. Russian original)Zbl 07455573

Math. Notes 110, No. 6, 947-951 (2021); translation from Mat. Zametki 110, No. 6, 916-921 (2021).
MSC:  41A65 46B20
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### Expansion theory for the two-sided best simultaneous approximations. (English)Zbl 07452333

MSC:  41A28 41A65 54C60
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### On the approximation of locally Lipschitz functions by delta-convex functions. (English)Zbl 1479.54038

MSC:  54C35 41A65

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### Error bounds for the method of simultaneous projections with infinitely many subspaces. (English)Zbl 07436514

MSC:  41A28 41A65
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### Sharp conditions for the convergence of greedy expansions with prescribed coefficients. (English)Zbl 07435622

MSC:  41A46 41A65
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### Exact discretization of the $$L_2$$-norm with negative weight. (English. Russian original)Zbl 1482.41023

Math. Notes 110, No. 3, 458-462 (2021); translation from Mat. Zametki 110, No. 3, 465-470 (2021).
MSC:  41A65 42A10
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### On the sum of simultaneously proximinal sets. (English)Zbl 07426811

MSC:  46-XX 41A65 46B20
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### On a generalisation of local uniform rotundity. (English)Zbl 07423840

MSC:  46B20 41A65
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### The best proximity pair focusing on monotonicity and $$T$$-absolutely direct sets. (English)Zbl 1481.41018

MSC:  41A65 41A52
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### On generalized least power approximation. (English)Zbl 1479.41007

MSC:  41A10 41A63 41A65
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### On weak well-posedness of the nearest point and mutually nearest point problems in Banach spaces. (English)Zbl 07400539

MSC:  46B20 41A65 54E52
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### Global solutions of approximation problems in Hilbert spaces. (English)Zbl 07394509

MSC:  47A05 46C05 41A65
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### Projection greedy algorithm. (English. Russian original)Zbl 1478.41009

Math. Notes 110, No. 1, 16-25 (2021); translation from Mat. Zametki 110, No. 1, 17-28 (2021).
MSC:  41A65 46C05 47N10
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### On the Korovkin-type approximation of set-valued continuous functions. (English)Zbl 07381522

MSC:  41A65 26E25 41A36
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### Error optimization in the operators of interlineation of functions on $$M$$ parallel lines. (English. Ukrainian original)Zbl 1470.41033

Cybern. Syst. Anal. 57, No. 2, 214-222 (2021); translation from Kibern. Sist. Anal. 57, No. 2, 52-61 (2021).
MSC:  41A65
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### Two results on strong proximinality. (English)Zbl 1477.46010

MSC:  46B04 46B20 41A65
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### Monotone path-connectedness of Chebyshev sets in three-dimensional spaces. (English. Russian original)Zbl 1472.41019

Sb. Math. 212, No. 5, 636-654 (2021); translation from Mat. Sb. 212, No. 5, 37-57 (2021).
MSC:  41A65 41A50 46A55
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### Properties of monotone connected sets. (English. Russian original)Zbl 1479.46018

Math. Notes 109, No. 5, 819-827 (2021); translation from Mat. Zametki 109, No. 5, 781-792 (2021).
MSC:  46B20 41A50 41A65
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### Example of divergence of a greedy algorithm with respect to an asymmetric dictionary. (English. Russian original)Zbl 1472.41020

Math. Notes 109, No. 3, 379-385 (2021); translation from Mat. Zametki 109, No. 3, 352-360 (2021).
MSC:  41A65 41A45 46B15
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### An example of a Banach space with non-Lipschitzian metric projection on any straight line. (English. Russian original)Zbl 1479.46010

Math. Notes 109, No. 2, 184-191 (2021); translation from Mat. Zametki 109, No. 2, 196-205 (2021).
MSC:  46B04 41A65
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### A Chebyshev-type theorem characterizing best approximation of a continuous function by elements of the sum of two algebras. (English. Russian original)Zbl 1468.41011

Math. Notes 109, No. 1, 15-20 (2021); translation from Mat. Zametki 109, No. 1, 19-26 (2021).
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### Reconstruction of functions from prescribed proximal points. (English)Zbl 1472.41014

MSC:  41A50 41A29 41A65
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### Greedy approximation for biorthogonal systems in quasi-Banach spaces. (English)Zbl 1478.46012

MSC:  46B15 41A65 46A16
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### Differentiability of distance function and the proximinal condition implying convexity. (English)Zbl 1477.46049

MSC:  46G05 46B20 41A65
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### Properties of monotone path-connected sets. (English. Russian original)Zbl 1466.41017

Izv. Math. 85, No. 2, 306-331 (2021); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 85, No. 2, 142-171 (2021).
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### A note on partially-greedy bases in quasi-Banach spaces. (English)Zbl 1476.46018

MSC:  46B15 41A65 46A16
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### A note on uniquely remotal sets in 2-Banach spaces. (English)Zbl 1474.46031

MSC:  46B20 41A50 41A65
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### Smoothness of subspace sections of the unit balls of $$C(Q)$$ and $$L^1$$. (English)Zbl 1464.46022

MSC:  46E15 41A65
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### Convergence of almost orbits of semigroups. (English)Zbl 07311019

MSC:  47H20 41A65
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### Hyers-Ulam stability of bijective $$\varepsilon$$-isometries between Hausdorff metric spaces of compact convex subsets. (English)Zbl 1469.46011

MSC:  46B04 41A65 46B20
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### Uniqueness of minimal projections in smooth expanded matrix spaces. (English)Zbl 1469.46009

MSC:  46B04 41A65
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### On certain subspaces of $$\ell_p$$ for $$0 < p \le 1$$ and their applications to conditional quasi-greedy bases in $$p$$-Banach spaces. (English)Zbl 1469.46013

MSC:  46B15 46A16 41A65
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### Quasi-greedy bases in $$\ell_p$$ ($$0 < p < 1$$) are democratic. (English)Zbl 1469.46014

MSC:  46B15 46A16 41A65
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### Pointwise best coapproximation in the space of Bochner integrable functions. (English)Zbl 07473689

MSC:  41A50 41A52 41A65

### A mean convergence theorem finding a common attractive point of two nonlinear mappings. (English)Zbl 07449806

MSC:  47H09 47H10 41A65
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### Theory of deep convolutional neural networks. II: Spherical analysis. (English)Zbl 1475.68313

MSC:  68T07 41A65
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### Strongly quasinonexpansive mappings. III. (English)Zbl 07413749

MSC:  47H09 54H25 41A65
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