Fanography

A tool to visually study the geography of Fano 3-folds.

Identification

Fano variety 2-19

blowup of 1-14 in a line

rank
2 (others)
$-\mathrm{K}_X^3$
26
$\mathrm{h}^{1,2}(X)$
2
Hodge diamond
1
0 0
0 2 0
0 2 2 0
0 2 0
0 0
1
Anticanonical bundle
index
1
$\dim\mathrm{H}^0(X,\omega_X^\vee)$
16
$-\mathrm{K}_X$ very ample?
yes
$-\mathrm{K}_X$ basepoint free?
yes
hyperelliptic
no
trigonal
no
Birational geometry

This variety is rational.


This variety is the blowup of

  • 1-14, in a curve of genus 0
  • 1-17, in a curve of genus 2
Deformation theory
number of moduli
5

$\mathrm{Aut}^0(X)$ $\dim\mathrm{Aut}^0(X)$ number of moduli
$0$ 0 5