Theorems · Theorem · geometry

Finset.weightedVSub_eq_weightedVSubOfPoint_of_sum_eq_zero

∀ {k : Type u_1} {V : Type u_2} {P : Type u_3} [inst : Ring k] [inst_1 : AddCommGroup V] [inst_2 : Module k V]
  [S : AddTorsor V P] {ι : Type u_4} (s : Finset ι) (w : ι → k) (p : ι → P),
  ∑ i ∈ s, w i = 0 → ∀ (b : P), (s.weightedVSub p) w = (s.weightedVSubOfPoint p b) w

weightedVSub gives the sum of the results of subtracting any base point, when the sum of the weights is 0.

Defined in

Mathlib.LinearAlgebra.AffineSpace.Combination

Cited by

7 results in Mathlib

Foundations

Depth 33 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

RingAddCommGroupModuleAddTorsor