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Latest news 2019-11-04: The giveaway of two signed copies of “Quack, quack, quack. Give my hat back!” has closed and the winning entrants have been selected. Thank you to everyone who took part.

B.22 Missing delimiter

You have forgotten to specify the type of delimiter you want (for example, ( ) [ ] \{ \}). (Remember to use a . if you want an invisible delimiter, and remember that if you want a curly brace, you must have a backslash followed by the curly brace.)

Example:

This error will occur if you do, say,


f(x) = \left{
\begin{array}{ll}
0 & x \leq 0\\
1 & x > 1
\end{array}
\right.
instead of

f(x) = \left\{
\begin{array}{ll}
0 & x \leq 0\\
1 & x > 1
\end{array}
\right.


This book is also available as A4 PDF or 12.8cm x 9.6cm PDF or paperback (ISBN 978-1-909440-00-5).

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