CICY7489

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
$X_{7489} = \left[\begin{array}{c|ccccc} \mathbb{P}^{2} & 2 & 1 & 0 & 0 & 0 \\ \mathbb{P}^{2} & 1 & 0 & 1 & 1 & 0 \\ \mathbb{P}^{2} & 1 & 0 & 1 & 0 & 1 \\ \mathbb{P}^{2} & 0 & 1 & 0 & 1 & 1 \end{array}\right]^{4,44}_{-80}$
Second Chern class: $c_2(X)\cdot D_i = \begin{pmatrix} 36 & 36 & 36 & 36 \end{pmatrix}^{T}$
Coxeter diagram Gallery →
Coxeter matrix: $\begin{pmatrix} 1 \end{pmatrix}$
Iso-flop reflections Kähler representation: $\hat{M}_1$ : row 1, Type 2
$\hat{M}_1 = \begin{pmatrix} -1 & 0 & 0 & 0 \\ 1 & 1 & 0 & 0 \\ 1 & 0 & 1 & 0 \\ 2 & 0 & 0 & 1 \end{pmatrix}$

Database record

Mathematica

<|Num -> 7489, H11 -> 4, H21 -> 44, C2 -> {36, 36, 36, 36}, Conf -> {{2, 1, 0, 0, 0}, {1, 0, 1, 1, 0}, {1, 0, 1, 0, 1}, {0, 1, 0, 1, 1}}, Favour -> True, KahlerPos -> True, IsProduct -> False, IsoFlopRows -> {{1, "Type 2"}}, KahlerRefGens -> {{{-1, 0, 0, 0}, {1, 1, 0, 0}, {1, 0, 1, 0}, {2, 0, 0, 1}}}, CoxeterMat -> {{1}}|>

Plain text

Num           : 7489
H11           : 4
H21           : 44
C2            : {36, 36, 36, 36}
Conf          : {{2, 1, 0, 0, 0}, {1, 0, 1, 1, 0}, {1, 0, 1, 0, 1}, {0, 1, 0, 1, 1}}
Favour        : True
KahlerPos     : True
IsProduct     : False
IsoFlopRows   : {{1, "Type 2"}}
KahlerRefGens : {{{-1, 0, 0, 0}, {1, 1, 0, 0}, {1, 0, 1, 0}, {2, 0, 0, 1}}}
CoxeterMat    : {{1}}