From: Approximation by bivariate Bernstein–Kantorovich–Stancu operators that reproduce exponential functions
\(\alpha _{1}=\alpha _{2}\)
\(\beta _{1}=\beta _{2}\)
\(\|\widetilde{K}_{90,90}^{\alpha ,\beta ,1,1}(f)-f\|\)
\(\|\widetilde{K}_{90,90}^{\alpha ,\beta}(f)-f\|\)
1
5
0.0520
0.1970
10
0.0507
0.2709
0.7197
100
0.0394
1.6340