A Korovkin-type approximation theorem for double sequences of positive linear operators of two variables in statistical $A$-summability sense
2010 ◽
Vol 47
(4)
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pp. 825-837
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2019 ◽
Vol 38
(7)
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pp. 69-83
2010 ◽
Vol 47
(3)
◽
pp. 321-332
2013 ◽
Vol 2013
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pp. 1-5
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