Matroid 3.9.109

Label	3.9.109
Id	`r3_n9_0****0**0******0****0***000************00***0*********`
Rank	3
n	9

Affine diagram.

Basic invariants

Bases	73
Circuits	71
Flats	25
Cyclic flats	13
Loops	0
Connected components	1
Automorphisms	36
Beta invariant	10
Girth	3
Simple	yes
Connected	yes
Uniform	not computed
Loopless	yes
Coloopless	yes
Paving	yes
Laminar	no
Nested	no
Self dual	no
Identically self dual	no
Series parallel	no
Transversal	no
Supersolvable	no
Divisionally free	no
Orientable	no
Three lines	yes

Representability

Characteristic set	characteristic 0 and all primes `[0]`
Realizable	yes
Realizable char0	yes
Regular	no
Binary	no
Ternary	no
Quaternary	no
Graphic	no

Realization space

Status	computed_realization_space
Dimension of realization space	4
Expected dimension over ℤ	0
Components of realization space	unknown
Free realization space	no
Principal ideal	yes
Birational type	empty how determined: birational type method: `empty_char0`
Birational type components	show []
Good basis	1,2,5
Good basis v2	1,5,6

Geometry

Realization space: scheme simple core id	`r3_n9_0****0**0******0****0***000************00***0*********`
Smooth char 0	yes
Singular primes	[]
Realization space: smooth over ℚ	not computed
Realization space: smooth over ℤ	yes how determined: smoothness method: `empty`
Realization space: is regular scheme	yes how determined: regularity method: `empty`
Realization space: singular fiber primes	[] how determined: singular fiber primes method: `smooth_over_ZZ`
Realization space: singular fiber characteristics	not computed
Realization space: characteristic dimensions	show [] how determined: characteristic dimensions method: `empty_characteristic_set`
Realization space: characteristic dimension unexpected	no
Realization space: characteristic dimension varies	no

Other

Char poly splits	false
Simplicial arrangement	yes
Realization space: n qbar components	0

Tutte polynomial

\(T = x_{0}^{3} + 6 x_{0}^{2} + 11 x_{0} x_{1} + 10 x_{0} + x_{1}^{6} + 3 x_{1}^{5} + 6 x_{1}^{4} + 10 x_{1}^{3} + 15 x_{1}^{2} + 10 x_{1}\)

Realization space

Ring	\(\mathbb{Z}[x_{1}, x_{2}]\)
Defining ideal	\(\left(1\right)\)
Inequations	\(0 \neq 0\), \(0 \neq 0\), \(0 \neq 0\), \(0 \neq 0\), \(0 \neq 0\), \(0 \neq 0\), \(0 \neq 0\), \(0 \neq 0\), \(0 \neq 0\), \(0 \neq 0\)
Realization matrix	none (empty realization space)

Combinatorics

Computed on the fly from the id.

Bases (73)

{1,2,4} {1,3,4} {2,3,4} {1,2,5} {1,3,5} {2,3,5} {2,4,5} {3,4,5} {1,2,6} {1,3,6} {2,3,6} {1,4,6} {3,4,6} {1,5,6} {2,5,6} {3,5,6} {4,5,6} {1,2,7} {1,3,7} {2,3,7} {1,4,7} {2,4,7} {1,5,7} {2,5,7} {3,5,7} {4,5,7} {1,6,7} {2,6,7} {3,6,7} {4,6,7} {1,2,8} {1,3,8} {2,3,8} {1,4,8} {2,4,8} {3,4,8} {1,5,8} {3,5,8} {4,5,8} {1,6,8} {2,6,8} {4,6,8} {5,6,8} {2,7,8} {3,7,8} {4,7,8} {5,7,8} {6,7,8} {1,2,9} {1,3,9} {2,3,9} {1,4,9} {2,4,9} {3,4,9} {1,5,9} {2,5,9} {4,5,9} {2,6,9} {3,6,9} {4,6,9} {5,6,9} {1,7,9} {3,7,9} {4,7,9} {5,7,9} {6,7,9} {1,8,9} {2,8,9} {3,8,9} {4,8,9} {5,8,9} {6,8,9} {7,8,9}

Non-bases (11)

{1,2,3} {1,4,5} {2,4,6} {3,4,7} {5,6,7} {2,5,8} {3,6,8} {1,7,8} {3,5,9} {1,6,9} {2,7,9}

Circuits (71)

{1,2,3} {1,4,5} {2,3,4,5} {2,4,6} {1,3,4,6} {1,2,5,6} {1,3,5,6} {2,3,5,6} {3,4,5,6} {1,2,4,7} {3,4,7} {1,2,5,7} {1,3,5,7} {2,3,5,7} {2,4,5,7} {1,2,6,7} {1,3,6,7} {2,3,6,7} {1,4,6,7} {5,6,7} {1,2,4,8} {1,3,4,8} {2,3,4,8} {2,5,8} {1,3,5,8} {3,4,5,8} {1,2,6,8} {3,6,8} {1,4,6,8} {1,5,6,8} {4,5,6,8} {1,7,8} {2,3,7,8} {2,4,7,8} {3,5,7,8} {4,5,7,8} {2,6,7,8} {4,6,7,8} {1,2,4,9} {1,3,4,9} {2,3,4,9} {1,2,5,9} {3,5,9} {2,4,5,9} {1,6,9} {2,3,6,9} {3,4,6,9} {2,5,6,9} {4,5,6,9} {2,7,9} {1,3,7,9} {1,4,7,9} {1,5,7,9} {4,5,7,9} {3,6,7,9} {4,6,7,9} {1,2,8,9} {1,3,8,9} {2,3,8,9} {1,4,8,9} {2,4,8,9} {3,4,8,9} {1,5,8,9} {4,5,8,9} {2,6,8,9} {4,6,8,9} {5,6,8,9} {3,7,8,9} {4,7,8,9} {5,7,8,9} {6,7,8,9}

Flats by rank (25)

rank 0 (1): {}
rank 1 (9): {1} {2} {3} {4} {5} {6} {7} {8} {9}
rank 2 (14): {1,2,3} {1,4,5} {2,4,6} {3,4,7} {5,6,7} {4,8} {2,5,8} {3,6,8} {1,7,8} {4,9} {3,5,9} {1,6,9} {2,7,9} {8,9}
rank 3 (1): {1,2,3,4,5,6,7,8,9}

Hyperplanes (14)

{1,2,3} {1,4,5} {2,4,6} {3,4,7} {5,6,7} {4,8} {2,5,8} {3,6,8} {1,7,8} {4,9} {3,5,9} {1,6,9} {2,7,9} {8,9}

Lines (11)

{1,2,3} {1,4,5} {2,4,6} {3,4,7} {5,6,7} {2,5,8} {3,6,8} {1,7,8} {3,5,9} {1,6,9} {2,7,9}

Dual (rank 6)

Revlex encoding in this labeling (not canonicalized, so not linked): ***********0*****0*0*************0**0****0*******0********0**********0******0******0

Bases: {3,5,6,7,8,9} {2,5,6,7,8,9} {1,5,6,7,8,9} {3,4,6,7,8,9} {2,4,6,7,8,9} {1,4,6,7,8,9} {1,3,6,7,8,9} {1,2,6,7,8,9} {3,4,5,7,8,9} {2,4,5,7,8,9} {1,4,5,7,8,9} {2,3,5,7,8,9} {1,2,5,7,8,9} {2,3,4,7,8,9} {1,3,4,7,8,9} {1,2,4,7,8,9} {1,2,3,7,8,9} {3,4,5,6,8,9} {2,4,5,6,8,9} {1,4,5,6,8,9} {2,3,5,6,8,9} {1,3,5,6,8,9} {2,3,4,6,8,9} {1,3,4,6,8,9} {1,2,4,6,8,9} {1,2,3,6,8,9} {2,3,4,5,8,9} {1,3,4,5,8,9} {1,2,4,5,8,9} {1,2,3,5,8,9} {3,4,5,6,7,9} {2,4,5,6,7,9} {1,4,5,6,7,9} {2,3,5,6,7,9} {1,3,5,6,7,9} {1,2,5,6,7,9} {2,3,4,6,7,9} {1,2,4,6,7,9} {1,2,3,6,7,9} {2,3,4,5,7,9} {1,3,4,5,7,9} {1,2,3,5,7,9} {1,2,3,4,7,9} {1,3,4,5,6,9} {1,2,4,5,6,9} {1,2,3,5,6,9} {1,2,3,4,6,9} {1,2,3,4,5,9} {3,4,5,6,7,8} {2,4,5,6,7,8} {1,4,5,6,7,8} {2,3,5,6,7,8} {1,3,5,6,7,8} {1,2,5,6,7,8} {2,3,4,6,7,8} {1,3,4,6,7,8} {1,2,3,6,7,8} {1,3,4,5,7,8} {1,2,4,5,7,8} {1,2,3,5,7,8} {1,2,3,4,7,8} {2,3,4,5,6,8} {1,2,4,5,6,8} {1,2,3,5,6,8} {1,2,3,4,6,8} {1,2,3,4,5,8} {2,3,4,5,6,7} {1,3,4,5,6,7} {1,2,4,5,6,7} {1,2,3,5,6,7} {1,2,3,4,6,7} {1,2,3,4,5,7} {1,2,3,4,5,6}

Loops: none. Parallel classes of size > 1: none.

Downloads

Record as JSON
OSCAR: matroid_from_revlex_basis_encoding("0******0******0**********0********0*******0****0**0*************0*0*****0***********", 3, 9)