From f8fba67dbbd125e165778404f9e15d5404b01d2a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois=20Boulogne?= <fboulogne sciunto org>
Date: Sun, 21 Dec 2014 08:57:08 -0500
Subject: [PATCH] DOC remplace iff by if and only if

---
 skimage/transform/finite_radon_transform.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/skimage/transform/finite_radon_transform.py b/skimage/transform/finite_radon_transform.py
index dd3bad33..b5bbaae0 100644
--- a/skimage/transform/finite_radon_transform.py
+++ b/skimage/transform/finite_radon_transform.py
@@ -29,7 +29,7 @@ def frt2(a):
 
     Notes
     -----
-    The FRT has a unique inverse iff n is prime. [FRT]
+    The FRT has a unique inverse if and only if n is prime. [FRT]
     The idea for this algorithm is due to Vlad Negnevitski.
 
     Examples
@@ -88,7 +88,7 @@ def ifrt2(a):
 
     Notes
     -----
-    The FRT has a unique inverse iff n is prime.
+    The FRT has a unique inverse if and only if n is prime.
     See [1]_ for an overview.
     The idea for this algorithm is due to Vlad Negnevitski.