simp [Order.grlex] at h
n✝ : ℕ
v₁ v₂ : Variables n✝ order.GrLex
h : Order.grlex v₁ v₂
⊢ algebra.Order.bgrlex v₁ v₂ = true
n✝ : ℕ
v₁ v₂ : Variables n✝ order.GrLex
h :
  if Order.grlex.elem_sum v₁ < Order.grlex.elem_sum v₂ then True
  else if Order.grlex.elem_sum v₁ = Order.grlex.elem_sum v₂ then if Order.lex v₁ v₂ then True else False else False
⊢ algebra.Order.bgrlex v₁ v₂ = true