Geodesic
Simultaneous reduction to block triangular form and theorems on pairs of complex idempotents
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 51 (2011) no. 6, pp. 979-982 Cet article a éte moissonné depuis la source Math-Net.Ru

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It is shown that the properties of idempotents found in recent journal publications can be justified in an easier way if a classical theorem concerning the simultaneous reduction of a pair of complex idempotents to block triangular form is used. 
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Kh. D. Ikramov. Simultaneous reduction to block triangular form and theorems on pairs of complex idempotents. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 51 (2011) no. 6, pp. 979-982. http://geodesic.mathdoc.fr/item/ZVMMF_2011_51_6_a1/

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