# Grassmannian.info

A periodic table of (generalised) Grassmannians.

## Generalised Grassmannian of type E7/P1

Basic information
dimension
33
index
17
Euler characteristic
126
Betti numbers
$\mathrm{b}_{ 0 } = 1$, $\mathrm{b}_{ 2 } = 1$, $\mathrm{b}_{ 4 } = 1$, $\mathrm{b}_{ 6 } = 1$, $\mathrm{b}_{ 8 } = 2$, $\mathrm{b}_{ 10 } = 2$, $\mathrm{b}_{ 12 } = 3$, $\mathrm{b}_{ 14 } = 3$, $\mathrm{b}_{ 16 } = 4$, $\mathrm{b}_{ 18 } = 4$, $\mathrm{b}_{ 20 } = 5$, $\mathrm{b}_{ 22 } = 5$, $\mathrm{b}_{ 24 } = 6$, $\mathrm{b}_{ 26 } = 6$, $\mathrm{b}_{ 28 } = 6$, $\mathrm{b}_{ 30 } = 6$, $\mathrm{b}_{ 32 } = 7$, $\mathrm{b}_{ 34 } = 7$, $\mathrm{b}_{ 36 } = 6$, $\mathrm{b}_{ 38 } = 6$, $\mathrm{b}_{ 40 } = 6$, $\mathrm{b}_{ 42 } = 6$, $\mathrm{b}_{ 44 } = 5$, $\mathrm{b}_{ 46 } = 5$, $\mathrm{b}_{ 48 } = 4$, $\mathrm{b}_{ 50 } = 4$, $\mathrm{b}_{ 52 } = 3$, $\mathrm{b}_{ 54 } = 3$, $\mathrm{b}_{ 56 } = 2$, $\mathrm{b}_{ 58 } = 2$, $\mathrm{b}_{ 60 } = 1$, $\mathrm{b}_{ 62 } = 1$, $\mathrm{b}_{ 64 } = 1$, $\mathrm{b}_{ 66 } = 1$
$\mathrm{Aut}^0(\mathrm{E}_{7}/\mathrm{P}_{1})$
adjoint group of type $\mathrm{E}_{ 7 }$
$\pi_0\mathrm{Aut}(\mathrm{E}_{7}/\mathrm{P}_{1})$
$1$
$\dim\mathrm{Aut}^0(\mathrm{E}_{7}/\mathrm{P}_{1})$
133
Projective geometry
minimal embedding

$\mathrm{E}_{7}/\mathrm{P}_{1}\hookrightarrow\mathbb{P}^{ 132 }$

degree
141430680
Hilbert series
1, 133, 7371, 238602, 5248750, 85709988, 1101296924, 11604306012, 103402141164, 797856027500, 5431803835220, 33125614508610, 183226228734150, 928793118827175, 4352687787515625, 18999500104801125, 77742635367237750, 299864450702202750, 1095594009861809250, 3807923569529625000, ...
Exceptional collections

No full exceptional collection is known for $\mathbf{D}^{\mathrm{b}}(\mathrm{E}_{7}/\mathrm{P}_{1})$. Will you be the first to construct one? Let us know if you do!

Quantum cohomology

The small quantum cohomology is not generically semisimple.

The big quantum cohomology is generically semisimple.

The eigenvalues of quantum multiplication by $\mathrm{c}_1(\mathrm{E}_{7}/\mathrm{P}_{1})$ are given by:

Homological projective duality