deletions | additions       diff --git a/bits2.tex b/bits2.tex  index e50fb15..bd5fca0 100644  --- a/bits2.tex  +++ b/bits2.tex 
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of $x$, the degree of $p$ is actually the maximal power of $x$ appearing in $p$.   The degree of the polynomial $p=0$ is conventionally set to $-\infty$.  As an example, the degree of $x^5+x^4+x^2+x$ is again $5$.  \\  Two polynomials are called \emph{equal} if they have the same degree $d$ and, for each $i=0,...,d$,  $x^i$ have the same coefficient in both of them.  We explain now how to sum two polynomials.   Actually, the operation is defined exactly as that with polynomials over