CICY7647

rank 1
ℤ₂
finite

Favorable Kähler-favProduct

$h^{1,1}$: 3
$h^{2,1}$: 47
$\chi$: −88
ambient factors: 3
polynomials: 4
iso-flops: 1
Coxeter rank: 1
Coxeter group: ℤ₂

Configuration matrix: 3×4 configuration
$X_{7647} = \left[\begin{array}{c|cccc} \mathbb{P}^{1} & 0 & 0 & 0 & 2 \\ \mathbb{P}^{3} & 1 & 1 & 1 & 1 \\ \mathbb{P}^{3} & 1 & 1 & 1 & 1 \end{array}\right]^{3,47}_{-88}$
Second Chern class: $c_2(X)\cdot D_i = \begin{pmatrix} 24 & 44 & 44 \end{pmatrix}^{T}$
Coxeter diagram Gallery →
Coxeter matrix: $\begin{pmatrix} 1 \end{pmatrix}$
Iso-flop reflections Kähler representation: $\hat{M}_1$ : row 1, Type 2
$\hat{M}_1 = \begin{pmatrix} -1 & 0 & 0 \\ 1 & 1 & 0 \\ 1 & 0 & 1 \end{pmatrix}$

Database record

Mathematica

<|Num -> 7647, H11 -> 3, H21 -> 47, C2 -> {24, 44, 44}, Conf -> {{0, 0, 0, 2}, {1, 1, 1, 1}, {1, 1, 1, 1}}, Favour -> True, KahlerPos -> True, IsProduct -> False, IsoFlopRows -> {{1, "Type 2"}}, KahlerRefGens -> {{{-1, 0, 0}, {1, 1, 0}, {1, 0, 1}}}, CoxeterMat -> {{1}}|>

Plain text

Num           : 7647
H11           : 3
H21           : 47
C2            : {24, 44, 44}
Conf          : {{0, 0, 0, 2}, {1, 1, 1, 1}, {1, 1, 1, 1}}
Favour        : True
KahlerPos     : True
IsProduct     : False
IsoFlopRows   : {{1, "Type 2"}}
KahlerRefGens : {{{-1, 0, 0}, {1, 1, 0}, {1, 0, 1}}}
CoxeterMat    : {{1}}