A self-adjoint “simultaneous crossing of the axis”.
Georgian mathematical journal, Tome 1 (1994) no. 2, pp. 173-181
@article{GMJ_1994__1_2_47336,
author = {Kreith, Kurt},
title = {A self-adjoint {\textquotedblleft}simultaneous crossing of the axis{\textquotedblright}.},
journal = {Georgian mathematical journal},
pages = {173--181},
year = {1994},
volume = {1},
number = {2},
zbl = {0830.35071},
language = {en},
url = {http://geodesic.mathdoc.fr/item/GMJ_1994__1_2_47336/}
}
Kreith, Kurt. A self-adjoint “simultaneous crossing of the axis”.. Georgian mathematical journal, Tome 1 (1994) no. 2, pp. 173-181. http://geodesic.mathdoc.fr/item/GMJ_1994__1_2_47336/