week1: fix markup processing?

[lambda.git] / test2.mdwn

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+
+Some authors reserve the term "term" for just variables and abstracts. We'll probably just say "term" and "expression" indiscriminately for expressions of any of these three forms.
+
+Examples of expressions:
+
+       x
+       (y x)
+       (x x)
+       (\x y)
+       (\x x)
+       (\x (\y x))
+       (x (\x x))
+       ((\x (x x)) (\x (x x)))
+
+The lambda calculus has an associated proof theory. For now, we can regard the
+proof theory as having just one rule, called the rule of **beta-reduction** or
+"beta-contraction". Suppose you have some expression of the form: