Sum-zero calculus

F3: three trees › Sum-zero calculus · lines 1037–1043

For $n \geq 2$ let

Σ_{n} := {(x_{1}, ξ_{1}; \dots; x_{n}, ξ_{n}) \in T^{*} M^{n} ∖ 0 : i = 1 \sum^{n} ξ_{i} = 0} .

Displayed formulas in this passage

unlabeled · line 1040
$Σ_{n} := {(x_{1}, ξ_{1}; \dots; x_{n}, ξ_{n}) \in T^{*} M^{n} ∖ 0 : i = 1 \sum^{n} ξ_{i} = 0} .$