CICY7507

rank 1
ℤ₂
finite

Favorable Kähler-favProduct

$h^{1,1}$: 4
$h^{2,1}$: 44
$\chi$: −80
ambient factors: 4
polynomials: 5
iso-flops: 1
Coxeter rank: 1
Coxeter group: ℤ₂

Configuration matrix: 4×5 configuration
$X_{7507} = \left[\begin{array}{c|ccccc} \mathbb{P}^{1} & 1 & 1 & 0 & 0 & 0 \\ \mathbb{P}^{1} & 0 & 0 & 1 & 1 & 0 \\ \mathbb{P}^{3} & 1 & 0 & 1 & 1 & 1 \\ \mathbb{P}^{3} & 0 & 1 & 1 & 1 & 1 \end{array}\right]^{4,44}_{-80}$
Second Chern class: $c_2(X)\cdot D_i = \begin{pmatrix} 24 & 24 & 44 & 44 \end{pmatrix}^{T}$
Coxeter diagram Gallery →
Coxeter matrix: $\begin{pmatrix} 1 \end{pmatrix}$
Iso-flop reflections Kähler representation: $\hat{M}_1$ : row 2, Type 1a
$\hat{M}_1 = \begin{pmatrix} 1 & 0 & 0 & 0 \\ 0 & -1 & 0 & 0 \\ 0 & 1 & 1 & 0 \\ 0 & 1 & 0 & 1 \end{pmatrix}$

Database record

Mathematica

<|Num -> 7507, H11 -> 4, H21 -> 44, C2 -> {24, 24, 44, 44}, Conf -> {{1, 1, 0, 0, 0}, {0, 0, 1, 1, 0}, {1, 0, 1, 1, 1}, {0, 1, 1, 1, 1}}, Favour -> True, KahlerPos -> True, IsProduct -> False, IsoFlopRows -> {{2, "Type 1a"}}, KahlerRefGens -> {{{1, 0, 0, 0}, {0, -1, 0, 0}, {0, 1, 1, 0}, {0, 1, 0, 1}}}, CoxeterMat -> {{1}}|>

Plain text

Num           : 7507
H11           : 4
H21           : 44
C2            : {24, 24, 44, 44}
Conf          : {{1, 1, 0, 0, 0}, {0, 0, 1, 1, 0}, {1, 0, 1, 1, 1}, {0, 1, 1, 1, 1}}
Favour        : True
KahlerPos     : True
IsProduct     : False
IsoFlopRows   : {{2, "Type 1a"}}
KahlerRefGens : {{{1, 0, 0, 0}, {0, -1, 0, 0}, {0, 1, 1, 0}, {0, 1, 0, 1}}}
CoxeterMat    : {{1}}