Tirthankar Bhattacharyya

activity

20022023

most citedOperator theory on the tetrablock

32 citations · 122 across the 34 of their papers we have counts for

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Showing 2012Show all

3 papers · 1 filter

math.FA2012

The Defect Sequence for Contractive Tuples

Tirthankar Bhattacharyya, Bata Krishna Das, Santanu Sarkar

We introduce the defect sequence for a contractive tuple of Hilbert space operators and investigate its properties. The defect sequence is a sequence of numbers, called defect dime…

math.FA2012★ 32 cited

Operator theory on the tetrablock

Tirthankar Bhattacharyya

We study a commuting triple of bounded operators $(A, B, P)$ which has the tetrablock as a spectral set.

math.FA2012

A functional model for pure $Γ$ -contractions

Tirthankar Bhattacharyya, Sourav Pal

A pair of commuting operators $(S, P)$ defined on a Hilbert space $H$ for which the closed symmetrized bidisc $$ Γ= \{(z_1+z_2,z_1z_2):: |z_1|\leq 1,\, |z_2|\leq 1 \}\subse…

The Defect Sequence for Contractive Tuples

Operator theory on the tetrablock

A functional model for pure Γ-contractions

A functional model for pure $Γ$ -contractions