Use Unicode longrightarrows in text.

The longrightarrows in math mode render poorly. Replace them with the
Unicode longrightarrow and then declare that to be rightarrow since
LaTeX has issues with it.

diff --git a/relat10.tex b/relat10.tex
index ad8b59123bce8ff6cf7267f624d58b77a05769b2..7e21dae3f1517847b9749c3e9124388a0db026f5 100644 (file)
--- a/relat10.tex
+++ b/relat10.tex
@@ -76,8 +76,12 @@
 \renewcommand{\thesection}{\alph{section}.}
 %\renewcommand{\thesection}{}
 
+\usepackage{ucs}
 \usepackage[utf8x]{inputenc}
 
+% Declare "longrightarrow" as "rightarrow" as the fomer never renders well.
+\DeclareUnicodeCharacter{10230}{→}
+
 \begin{document}
 
 %\gtitle{Relativity: The Special and General Theory}
@@ -747,8 +751,8 @@ raise the following objection:
 
 "Your definition would certainly be right, if only I knew that the
 light by means of which the observer at M perceives the lightning
-flashes travels along the length A~$\longrightarrow$~M with the same velocity as
-along the length B~$\longrightarrow$~M. But an examination of this supposition
+flashes travels along the length A⟶M with the same velocity as
+along the length B⟶M. But an examination of this supposition
 would only be possible if we already had at our disposal the means of
 measuring time. It would thus appear as though we were moving here in
 a logical circle."
@@ -762,7 +766,7 @@ made of the definition of simultaneity, namely, that in every real
 case it must supply us with an empirical decision as to whether or not
 the conception that has to be defined is fulfilled. That my definition
 satisfies this demand is indisputable. That light requires the same
-time to traverse the path A~$\longrightarrow$~M as for the path B~$\longrightarrow$~M is in
+time to traverse the path A⟶M as for the path B⟶M is in
 reality neither a supposition nor a hypothesis about the physical
 nature of light, but a stipulation which I can make of my own freewill
 in order to arrive at a definition of simultaneity."
@@ -870,9 +874,9 @@ answer must be in the negative.
 When we say that the lightning strokes A and B are simultaneous with
 respect to be embankment, we mean: the rays of light emitted at the
 places A and B, where the lightning occurs, meet each other at the
-mid-point M of the length A $\longrightarrow$ B of the embankment. But the events
+mid-point M of the length A⟶B of the embankment. But the events
 A and B also correspond to positions A and B on the train. Let M$'$ be
-the mid-point of the distance A $\longrightarrow$ B on the travelling train. Just
+the mid-point of the distance A⟶B on the travelling train. Just
 when the flashes (as judged from the embankment) of lightning occur,
 this point M$'$ naturally coincides with the point M but it moves
 towards the right in the diagram with the velocity v of the train. If