CICY Coxeter DB | 4839

CICY4839

  • rank 2
  • I₂(2)
  • finite
Favorable Kähler-favProduct
h1,1h^{1,1}
5
h2,1h^{2,1}
27
χ\chi
−44
ambient factors
5
polynomials
7
iso-flops
2
Coxeter rank
2
Coxeter group
I₂(2)
Configuration matrix
5×7 configuration
X4839=[P11100000P10011000P21000200P20010110P40101012]−445,27X_{4839} = \left[\begin{array}{c|ccccccc} \mathbb{P}^{1} & 1 & 1 & 0 & 0 & 0 & 0 & 0 \\ \mathbb{P}^{1} & 0 & 0 & 1 & 1 & 0 & 0 & 0 \\ \mathbb{P}^{2} & 1 & 0 & 0 & 0 & 2 & 0 & 0 \\ \mathbb{P}^{2} & 0 & 0 & 1 & 0 & 1 & 1 & 0 \\ \mathbb{P}^{4} & 0 & 1 & 0 & 1 & 0 & 1 & 2 \end{array}\right]^{5,27}_{-44}
Second Chern class
c2(X)⋅Di=(2424363652)Tc_2(X)\cdot D_i = \begin{pmatrix} 24 & 24 & 36 & 36 & 52 \end{pmatrix}^{T}
Coxeter diagram Gallery →
Coxeter matrix
(1221)\begin{pmatrix} 1 & 2 \\ 2 & 1 \end{pmatrix}
Iso-flop reflections Kähler representation
M^1\hat{M}_1: row 3, Type 2
M^1=(102000100000−1000011000001)\hat{M}_1 = \begin{pmatrix} 1 & 0 & 2 & 0 & 0 \\ 0 & 1 & 0 & 0 & 0 \\ 0 & 0 & -1 & 0 & 0 \\ 0 & 0 & 1 & 1 & 0 \\ 0 & 0 & 0 & 0 & 1 \end{pmatrix}
M^2\hat{M}_2: row 5, Type 2
M^2=(100020100200100000120000−1)\hat{M}_2 = \begin{pmatrix} 1 & 0 & 0 & 0 & 2 \\ 0 & 1 & 0 & 0 & 2 \\ 0 & 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & 1 & 2 \\ 0 & 0 & 0 & 0 & -1 \end{pmatrix}

Database record

Mathematica 
<|Num -> 4839, H11 -> 5, H21 -> 27, C2 -> {24, 24, 36, 36, 52}, Conf -> {{1, 1, 0, 0, 0, 0, 0}, {0, 0, 1, 1, 0, 0, 0}, {1, 0, 0, 0, 2, 0, 0}, {0, 0, 1, 0, 1, 1, 0}, {0, 1, 0, 1, 0, 1, 2}}, Favour -> True, KahlerPos -> True, IsProduct -> False, IsoFlopRows -> {{3, "Type 2"}, {5, "Type 2"}}, KahlerRefGens -> {{{1, 0, 2, 0, 0}, {0, 1, 0, 0, 0}, {0, 0, -1, 0, 0}, {0, 0, 1, 1, 0}, {0, 0, 0, 0, 1}}, {{1, 0, 0, 0, 2}, {0, 1, 0, 0, 2}, {0, 0, 1, 0, 0}, {0, 0, 0, 1, 2}, {0, 0, 0, 0, -1}}}, CoxeterMat -> {{1, 2}, {2, 1}}|>
Plain text 
Num           : 4839
H11           : 5
H21           : 27
C2            : {24, 24, 36, 36, 52}
Conf          : {{1, 1, 0, 0, 0, 0, 0}, {0, 0, 1, 1, 0, 0, 0}, {1, 0, 0, 0, 2, 0, 0}, {0, 0, 1, 0, 1, 1, 0}, {0, 1, 0, 1, 0, 1, 2}}
Favour        : True
KahlerPos     : True
IsProduct     : False
IsoFlopRows   : {{3, "Type 2"}, {5, "Type 2"}}
KahlerRefGens : {{{1, 0, 2, 0, 0}, {0, 1, 0, 0, 0}, {0, 0, -1, 0, 0}, {0, 0, 1, 1, 0}, {0, 0, 0, 0, 1}}, {{1, 0, 0, 0, 2}, {0, 1, 0, 0, 2}, {0, 0, 1, 0, 0}, {0, 0, 0, 1, 2}, {0, 0, 0, 0, -1}}}
CoxeterMat    : {{1, 2}, {2, 1}}