- ... written
^{1.1}
- Actually, this is
strictly true only for finite-dimensional spaces. Only a special subset
of denumerably infinite dimensional spaces have this property ( i.e., they
are complete). However, because a ket space must be complete if it is
to represent the states of a microscopic system, we can restrict our attention to
this special subset.
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- ... ket.
^{1.2}
- We
can now appreciate the elegance of Dirac's
notation. The combination of a bra and a ket yields a ``bra(c)ket'' (which is
just a complex number).
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