Figure 4From: Bivariate Chebyshev polynomials of the fifth kind for variable-order time-fractional partial integro-differential equations with weakly singular kernelExact and approximate solutions for \(N=3\), \(\sigma (x, t)=1-\cos (x) e^{-t}\), \(\mathfrak{h}(t)=\cos (t)\) at times \(t=0.25, 0.50, 0.75, 1\) for Example 6.3Back to article page