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-rw-r--r--abcd.m2
1 files changed, 1 insertions, 1 deletions
diff --git a/abcd.m b/abcd.m
index 466dd24..20ae061 100644
--- a/abcd.m
+++ b/abcd.m
@@ -6,7 +6,7 @@ function lens_abcd =abcd_lens(focal_distance)
lens_abcd = [1, 0; -1/focal_distance, 1];
endfunction
-function qnew=q_after_element(q_old,abcd)
+function qnew=q_after_abcd(q_old,abcd)
qnew=(q_old*abcd(1,1)+abcd(1,2))/(q_old*abcd(2,1)+abcd(2,2));
endfunction