Spin coefficient transformation for null rotation with $l$ fixed

  • #1
In Newmann-Penrose formalism, a Null rotation with ##l## fixed is
$$l^a−>l^a\\
n^a−>n^a+\bar{c}m^a+c\bar{m}^a+c\bar{c}l^a\\
m^a−>m^a+cl^a\\
\bar{m}^a−>\bar{m}^a+\bar{c}l^a$$
Using this transformation, how to prove?
$$π−>π+2\bar{c}ϵ+\bar{c}^2κ+D\bar{c}$$
Ref: 2-Spinors by P.O'Donell, p.no, 65
 
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  • #2
PeterDonis
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One quick note on LaTeX: LaTeX inline in a paragraph is delimited with two pound signs (2 #), not $. I've fixed the OP of this thread accordingly.
 

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