2-dimensional cubic lattice

basis | (1 | 0) | (0 | 1) Gram matrix | (1 | 0 0 | 1)

dimension | 2 determinant | 1 minimal squared norm | 1 smallest vectors | (1 | 0) | (0 | 1) | (-1 | 0) | (0 | -1) kissing number | 4

packing radius | 1/2 = 0.5 covering radius | 1/sqrt(2)≈0.707107 density | π/4≈0.785398 center density | 1/4 = 0.25 Hermite invariant | 1 thickness | π/2≈1.5708 volume | 1

quadratic form | x^2 + y^2 theta series (closed series) | ϑ_3(0, e^(i π x))^2

dual | integer lattice | 2 modular number | 1 number of symmetries | 8

integral | odd | unimodular