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-rw-r--r--src/Total/Reduction.idr5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/Total/Reduction.idr b/src/Total/Reduction.idr
index 4870f30..cb13706 100644
--- a/src/Total/Reduction.idr
+++ b/src/Total/Reduction.idr
@@ -95,3 +95,8 @@ wknStep (RecCong2 step) = RecCong2 (wknStep step)
wknStep (RecCong3 step) = RecCong3 (wknStep step)
wknStep RecZero = RecZero
wknStep RecSuc = RecSuc
+
+export
+wknSteps : t >= u -> wkn t thin >= wkn u thin
+wknSteps [<] = [<]
+wknSteps (steps :< step) = wknSteps steps :< wknStep step