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Projective unitary representation
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)
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Branch of physics
Quantum mechanics
Wavefunction
Probability amplitude
Born rule
Wigner theorem
Created
2026-09-24
Updated
2026-09-24
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Because state
vectors
differing by
a
quantum phase
represent the same ray,
a
unitary realization of
a
group action
need only satisfy
U
(
g
1
)
U
(
g
2
)
=
e
i
ϕ
(
g
1
,
g
2
)
U
(
g
1
g
2
)
.
(1)
Ancestors
(8)
Wigner theorem
Born rule
Probability amplitude
Wavefunction
Quantum mechanics
Branch of physics
Physics
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Past exam of the mathematics course of the University of Cambridge
/
2007
/
iii
/
Paper 10
/
8
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2009
/
iii
/
Paper 45
/
3
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2021
/
ii
/
Paper 1
/
34B
/
a
/
Solution
Projective unitary representation
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