196 INDEX OF NOTATION
Rp+1, real rational functions of degree p+1
with only real critical points, 135
RP≥0,
A
nonnegative orthant, 83
RPn,
real projective space, 2
σm,p, degree of real Wronski map, 10
σ(ω), signature of a foldable triangulation,
85
σ(P ), sign-imbalance of poset P , 92
sign(w), sign of permutation w, 93
SN , symmetric group, 149
Sn,
n-dimensional sphere, 80
Sω, regular subdivision, 42
St(p, m+p), Stiefel manifold, 96
StR(2, p+1), real Stiefel manifold, 134
T, nonzero complex numbers
C∗,
1, 3, 26
TR, nonzero real numbers
R∗,
1, 65
TxX, tangent space of X at x, 11
ubcD(C), number of unbounded
components of curve C, 67
VD(g1, . . . , gm), common zeroes of gi in D,
67
var(c), variation in a sequence c, 14
var(F, a), variation in a sequence F of
polynomials at a R, 14
Vμ, highest weight module, 153
volume(Δ), volume of polytope Δ, 3, 26
Wκ,c(x), Wronski polynomial, 85
Wr, Wronski map, 5
Wr(f1,. . . , fm), Wronskian of f1,. . . , fm, 5
WrR, real Wronski map, 11
XA, toric variety, 29
XA, toric degeneration, 40
xa,
monomial, 3
XαF•, Schubert variety, 117
XαF•,

Schubert cell, 126
X(l, n), Khovanskii number, 4, 49, 50
XR(l, n), Khovanskii number, 50
XwB, Schubert variety, 179
YA, real part of toric variety XA, 79
YA
+
, spherical toric variety, 80
YA,, positive part of toric variety XA, 88
Z, integers, 1
ZA, integer affine span of A, 28
Zn,
integer lattice, 2
[Zn : ZA], lattice index, 28
Previous Page Next Page