isVexillary -- whether a permutation is vexillary

Description

i1 : p = permutation {3,1,2,5,4}

o1 = Permutation{3, 1, 2, 5, 4}

o1 : Permutation

i2 : isVexillary p

o2 = false

Acknowledgement

See also

• avoidsPattern -- whether a permutation avoids a pattern
• avoidsPatterns -- whether a permutation simultaneously avoids a list of patterns
• isCartwrightSturmfels -- whether a permutation is Cartwright-Sturmfels
• isCDG -- whether a permutation is CDG.
• isSeparable -- whether a permutation is separable.