Mixed Mortar Element Method for𝑃₁^𝑁𝐶/𝑃₀ Element and Its Multigrid Method for the Incompressible Stokes Problem

Table 1

Error estimate for the mortar element method with ℎ_1,1=1/4 and ℎ_1,2=1/6.

𝑘	𝑁𝑢	𝑁𝑝	‖𝑢−𝑢𝑘‖0,𝑑	‖𝑝−𝑝𝑘‖𝐿2(Ω)
1	178	51	0.0772974	0.164013
2	668	207	0.0455288	0.133103
3	2584	831	0.0242334	0.0733174
4	10160	3327	0.0123836	0.037679
5	40288	13311	0.00619081	0.0195834