Figure 3
From: Lebesgue functions and Lebesgue constants in polynomial interpolation
Graphs of sets of 33 nodes; \(\pmb{(\ast) \breve{T} }\) , \(\pmb{(\diamond) \bar{U}}\) , \(\pmb{(\bullet) \hat{T}}\) , \(\pmb{(\circ) T}\) , \(\pmb{(\times) U}\) , \(\pmb{(\square) E}\) from top to bottom.