1.๐๐ ๐๐๐๐ข๐ฌ๐ก; Book ( Matrix theory- Classics and Advance, Edited by Mykhaylo Andriychuk ) Chapter 5 , " A study on approximation of a conjugate function using Cesaro- Matrix product operator" published ๐ข๐ง ๐ญ๐ก๐ ๐ฉ๐ฎ๐๐ฅ๐ข๐๐๐ญ๐ข๐จ๐ง- ๐ข๐ง๐ญ๐๐๐ก ๐จ๐ฉ๐๐ง, ๐๐จ๐ง๐๐จ๐ง, ๐๐ง๐ข๐ญ๐๐ ๐๐ข๐ง๐ ๐๐จ๐ฆ, ๐๐๐๐. |
2.H. K. Nigam and ๐๐ ๐๐๐๐ข๐ฌ๐ก; Best approximation of functions in generalized Holder class," ๐๐จ๐ฎ๐ซ๐ง๐๐ฅ ๐จ๐ ๐ข๐ง๐๐ช๐ฎ๐๐ฅ๐ข๐ญ๐ข๐๐ฌ ๐๐ง๐ ๐๐ฉ๐ฉ๐ฅ๐ข๐๐๐ญ๐ข๐จ๐ง๐ฌ", 2018(2018), 2018, 276 (๐๐๐, ๐๐ฆ๐ฉ๐๐๐ญ ๐
๐๐๐ญ๐จ๐ซ- ๐.๐)
DOI https://doi.org/10.1186/s13660-018-1864-y |
3.H.K Nigam and ๐๐ ๐๐๐๐ข๐ฌ๐ก; Functional approximation in Besov space using generalized Norlund-Hausdorff product matrix ; "๐๐จ๐ฎ๐ซ๐ง๐๐ฅ ๐จ๐ ๐ข๐ง๐๐ช๐ฎ๐๐ฅ๐ข๐ญ๐ข๐๐ฌ ๐๐ง๐ ๐๐ฉ๐ฉ๐ฅ๐ข๐๐๐ญ๐ข๐จ๐ง๐ฌ", 2019(2019), 2019, 191 (๐๐๐, ๐๐ฆ๐ฉ๐๐๐ญ ๐
๐๐๐ญ๐จ๐ซ- ๐.๐)
DOI
https://doi.org/10.1186/s13660-019-2128-1 |
4. H. K. Nigam and ๐๐ ๐๐๐๐ข๐ฌ๐ก; "On approximation of function in generalized Zygmund class using C ฮทT operator." ๐๐จ๐ฎ๐ซ๐ง๐๐ฅ ๐จ๐ ๐๐๐ญ๐ก๐๐ฆ๐๐ญ๐ข๐๐๐ฅ ๐๐ง๐๐ช๐ฎ๐๐ฅ๐ข๐ญ๐ข๐๐ฌ", 14.1 (2020): 273-289.(๐๐๐, ๐๐ฆ๐ฉ๐๐๐ญ ๐
๐๐๐ญ๐จ๐ซ- ๐.225, )
DOI dx.doi.org/10.7153/jmi-2020-14-18 |
5.H. K. Nigam. and ๐๐ ๐๐๐๐ข๐ฌ๐ก, M., 2019. Trigonometric approximation of functions by Hausdorff-Matrix product operators. ๐๐จ๐ง๐ฅ๐ข๐ง๐๐๐ซ ๐
๐ฎ๐ง๐๐ญ๐ข๐จ๐ง๐๐ฅ ๐๐ง๐๐ฅ๐ฒ๐ฌ๐ข๐ฌ ๐๐ง๐ ๐๐ฉ๐ฉ๐ฅ๐ข๐๐๐ญ๐ข๐จ๐ง๐ฌ, 24, pp.675-689(Scopus) |
6.H. K. Nigam. and ๐๐ ๐๐๐๐ข๐ฌ๐ก., 2020. Approximation of a Function in Holder Class Using Double Karamata (k^(ฮป, ฮผ)) Method. European journal of pure and applied mathematics, 13(3), pp.567-578.(๐๐๐๐) |
7.H. K. Nigam. and ๐๐ ๐๐๐๐ข๐ฌ๐ก., 2020. A STUDY ON APPROXIMATION OF A CONJUGATE FUNCTION USING CES ARO-MATRIX PRODUCT OPERATOR. Nonlinear Functional Analysis and Applications, 25(4), pp.697-713.(
Scopus) |
8. ๐๐ ๐๐๐๐ข๐ฌ๐ก, T. Garg and H.N. Sah, 2024, Approximation of functions(signals) in L[0, โ ] by product summability (\ bar{N}, p_n, q_n) (E, s) means of its Fourier laguerre series, Proceeding Conference(First National Conference) of Government Engineering College West Champaran Bihar. |