Geodesic
Property of polynomials in two projectors
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 55 (2015) no. 2, pp. 189-192 Cet article a éte moissonné depuis la source Math-Net.Ru

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It is proved that a polynomial in two projectors vanishes for all pairs of projectors only if all the coefficients of this polynomial are equal to zero. 
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A. M. Vetoshkin. Property of polynomials in two projectors. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 55 (2015) no. 2, pp. 189-192. http://geodesic.mathdoc.fr/item/ZVMMF_2015_55_2_a2/

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