SO(2) invariants of a set of 2 x 2 matrices.
Aslaksen, Helmer
Mathematica Scandinavica, Tome 64 (1989), p. 59-66 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1989-01-01
EUDML-ID : urn:eudml:doc:167066 
@article{GDZPPN002360128,
     title = {SO(2) invariants of a set of 2 x 2 matrices.},
     journal = {Mathematica Scandinavica},
     volume = {64},
     year = {1989},
     pages = {59-66},
     zbl = {0679.15029},
     url = {http://dml.mathdoc.fr/item/GDZPPN002360128}
}

Aslaksen, Helmer. SO(2) invariants of a set of 2 x 2 matrices.. Mathematica Scandinavica, Tome 64 (1989) pp. 59-66. http://gdmltest.u-ga.fr/item/GDZPPN002360128/