CICY Coxeter DB | 1995

CICY1995

  • rank 1
  • ℤ₂
  • finite
Favorable Kähler-favProduct
h1,1h^{1,1}
8
h2,1h^{2,1}
22
χ\chi
−28
ambient factors
8
polynomials
8
iso-flops
1
Coxeter rank
1
Coxeter group
ℤ₂
Configuration matrix
8×8 configuration
X1995=[P111000000P100101000P100010100P100000110P100000020P210010001P201001100P200100011]−288,22X_{1995} = \left[\begin{array}{c|cccccccc} \mathbb{P}^{1} & 1 & 1 & 0 & 0 & 0 & 0 & 0 & 0 \\ \mathbb{P}^{1} & 0 & 0 & 1 & 0 & 1 & 0 & 0 & 0 \\ \mathbb{P}^{1} & 0 & 0 & 0 & 1 & 0 & 1 & 0 & 0 \\ \mathbb{P}^{1} & 0 & 0 & 0 & 0 & 0 & 1 & 1 & 0 \\ \mathbb{P}^{1} & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 0 \\ \mathbb{P}^{2} & 1 & 0 & 0 & 1 & 0 & 0 & 0 & 1 \\ \mathbb{P}^{2} & 0 & 1 & 0 & 0 & 1 & 1 & 0 & 0 \\ \mathbb{P}^{2} & 0 & 0 & 1 & 0 & 0 & 0 & 1 & 1 \end{array}\right]^{8,22}_{-28}
Second Chern class
c2(X)⋅Di=(2424242424363636)Tc_2(X)\cdot D_i = \begin{pmatrix} 24 & 24 & 24 & 24 & 24 & 36 & 36 & 36 \end{pmatrix}^{T}
Coxeter diagram Gallery →
Coxeter matrix
(1)\begin{pmatrix} 1 \end{pmatrix}
Iso-flop reflections Kähler representation
M^1\hat{M}_1: row 5, Type 2
M^1=(100000000100000000100000000110000000−1000000001000000001000001001)\hat{M}_1 = \begin{pmatrix} 1 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 1 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 1 & 1 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & -1 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 0 & 1 & 0 & 0 & 1 \end{pmatrix}

Database record

Mathematica 
<|Num -> 1995, H11 -> 8, H21 -> 22, C2 -> {24, 24, 24, 24, 24, 36, 36, 36}, Conf -> {{1, 1, 0, 0, 0, 0, 0, 0}, {0, 0, 1, 0, 1, 0, 0, 0}, {0, 0, 0, 1, 0, 1, 0, 0}, {0, 0, 0, 0, 0, 1, 1, 0}, {0, 0, 0, 0, 0, 0, 2, 0}, {1, 0, 0, 1, 0, 0, 0, 1}, {0, 1, 0, 0, 1, 1, 0, 0}, {0, 0, 1, 0, 0, 0, 1, 1}}, Favour -> True, KahlerPos -> True, IsProduct -> False, IsoFlopRows -> {{5, "Type 2"}}, KahlerRefGens -> {{{1, 0, 0, 0, 0, 0, 0, 0}, {0, 1, 0, 0, 0, 0, 0, 0}, {0, 0, 1, 0, 0, 0, 0, 0}, {0, 0, 0, 1, 1, 0, 0, 0}, {0, 0, 0, 0, -1, 0, 0, 0}, {0, 0, 0, 0, 0, 1, 0, 0}, {0, 0, 0, 0, 0, 0, 1, 0}, {0, 0, 0, 0, 1, 0, 0, 1}}}, CoxeterMat -> {{1}}|>
Plain text 
Num           : 1995
H11           : 8
H21           : 22
C2            : {24, 24, 24, 24, 24, 36, 36, 36}
Conf          : {{1, 1, 0, 0, 0, 0, 0, 0}, {0, 0, 1, 0, 1, 0, 0, 0}, {0, 0, 0, 1, 0, 1, 0, 0}, {0, 0, 0, 0, 0, 1, 1, 0}, {0, 0, 0, 0, 0, 0, 2, 0}, {1, 0, 0, 1, 0, 0, 0, 1}, {0, 1, 0, 0, 1, 1, 0, 0}, {0, 0, 1, 0, 0, 0, 1, 1}}
Favour        : True
KahlerPos     : True
IsProduct     : False
IsoFlopRows   : {{5, "Type 2"}}
KahlerRefGens : {{{1, 0, 0, 0, 0, 0, 0, 0}, {0, 1, 0, 0, 0, 0, 0, 0}, {0, 0, 1, 0, 0, 0, 0, 0}, {0, 0, 0, 1, 1, 0, 0, 0}, {0, 0, 0, 0, -1, 0, 0, 0}, {0, 0, 0, 0, 0, 1, 0, 0}, {0, 0, 0, 0, 0, 0, 1, 0}, {0, 0, 0, 0, 1, 0, 0, 1}}}
CoxeterMat    : {{1}}