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<span class="Comment">/*</span><span class="Comment">*************************************************************************\</span>
<span class="Comment">MODULE: mat_GF2E</span>
<span class="Comment">SUMMARY:</span>
<span class="Comment">Defines the class mat_GF2E.</span>
<span class="Comment">\*************************************************************************</span><span class="Comment">*/</span>
<span class="PreProc">#include </span><span class="String"><NTL/matrix.h></span>
<span class="PreProc">#include </span><span class="String"><NTL/vec_vec_GF2E.h></span>
<span class="Type">typedef</span> Mat<GF2E> mat_GF2E; <span class="Comment">// backward compatibility</span>
<span class="Type">void</span> add(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A, <span class="Type">const</span> mat_GF2E& B);
<span class="Comment">// X = A + B</span>
<span class="Type">void</span> sub(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A, <span class="Type">const</span> mat_GF2E& B);
<span class="Comment">// X = A - B = A + B</span>
<span class="Type">void</span> negate(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A);
<span class="Comment">// X = - A = A</span>
<span class="Type">void</span> mul(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A, <span class="Type">const</span> mat_GF2E& B);
<span class="Comment">// X = A * B</span>
<span class="Type">void</span> mul(vec_GF2E& x, <span class="Type">const</span> mat_GF2E& A, <span class="Type">const</span> vec_GF2E& b);
<span class="Comment">// x = A * b</span>
<span class="Type">void</span> mul(vec_GF2E& x, <span class="Type">const</span> vec_GF2E& a, <span class="Type">const</span> mat_GF2E& B);
<span class="Comment">// x = a * B</span>
<span class="Type">void</span> mul(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A, <span class="Type">const</span> GF2E& b);
<span class="Type">void</span> mul(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A, GF2 b);
<span class="Type">void</span> mul(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A, <span class="Type">long</span> b);
<span class="Comment">// X = A * b</span>
<span class="Type">void</span> mul(mat_GF2E& X, <span class="Type">const</span> GF2E& a, <span class="Type">const</span> mat_GF2E& B);
<span class="Type">void</span> mul(mat_GF2E& X, GF2 a, <span class="Type">const</span> mat_GF2E& B);
<span class="Type">void</span> mul(mat_GF2E& X, <span class="Type">long</span> a, <span class="Type">const</span> mat_GF2E& B);
<span class="Comment">// X = a * B</span>
<span class="Type">void</span> determinant(GF2E& d, <span class="Type">const</span> mat_GF2E& A);
GF2E determinant(<span class="Type">const</span> mat_GF2E& a);
<span class="Comment">// d = determinant(A)</span>
<span class="Type">void</span> transpose(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A);
mat_GF2E transpose(<span class="Type">const</span> mat_GF2E& A);
<span class="Comment">// X = transpose of A</span>
<span class="Type">void</span> solve(GF2E& d, vec_GF2E& x, <span class="Type">const</span> mat_GF2E& A, <span class="Type">const</span> vec_GF2E& b);
<span class="Comment">// A is an n x n matrix, b is a length n vector. Computes d = determinant(A).</span>
<span class="Comment">// If d != 0, solves x*A = b.</span>
<span class="Type">void</span> solve(GF2E& d, <span class="Type">const</span> mat_GF2E& A, vec_GF2E& x, <span class="Type">const</span> vec_GF2E& b);
<span class="Comment">// A is an n x n matrix, b is a length n vector. Computes d = determinant(A).</span>
<span class="Comment">// If d != 0, solves A*x = b (so x and b are treated as a column vectors).</span>
<span class="Type">void</span> inv(GF2E& d, mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A);
<span class="Comment">// A is an n x n matrix. Computes d = determinant(A). If d != 0,</span>
<span class="Comment">// computes X = A^{-1}.</span>
<span class="Type">void</span> sqr(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A);
mat_GF2E sqr(<span class="Type">const</span> mat_GF2E& A);
<span class="Comment">// X = A*A </span>
<span class="Type">void</span> inv(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A);
mat_GF2E inv(<span class="Type">const</span> mat_GF2E& A);
<span class="Comment">// X = A^{-1}; error is raised if A is singular</span>
<span class="Type">void</span> power(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A, <span class="Type">const</span> ZZ& e);
mat_GF2E power(<span class="Type">const</span> mat_GF2E& A, <span class="Type">const</span> ZZ& e);
<span class="Type">void</span> power(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A, <span class="Type">long</span> e);
mat_GF2E power(<span class="Type">const</span> mat_GF2E& A, <span class="Type">long</span> e);
<span class="Comment">// X = A^e; e may be negative (in which case A must be nonsingular).</span>
<span class="Type">void</span> ident(mat_GF2E& X, <span class="Type">long</span> n);
mat_GF2E ident_mat_GF2E(<span class="Type">long</span> n);
<span class="Comment">// X = n x n identity matrix</span>
<span class="Type">long</span> IsIdent(<span class="Type">const</span> mat_GF2E& A, <span class="Type">long</span> n);
<span class="Comment">// test if A is the n x n identity matrix</span>
<span class="Type">void</span> diag(mat_GF2E& X, <span class="Type">long</span> n, <span class="Type">const</span> GF2E& d);
mat_GF2E diag(<span class="Type">long</span> n, <span class="Type">const</span> GF2E& d);
<span class="Comment">// X = n x n diagonal matrix with d on diagonal</span>
<span class="Type">long</span> IsDiag(<span class="Type">const</span> mat_GF2E& A, <span class="Type">long</span> n, <span class="Type">const</span> GF2E& d);
<span class="Comment">// test if X is an n x n diagonal matrix with d on diagonal</span>
<span class="Type">void</span> random(mat_GF2E& x, <span class="Type">long</span> n, <span class="Type">long</span> m); <span class="Comment">// x = random n x m matrix</span>
mat_GF2E random_mat_GF2E(<span class="Type">long</span> n, <span class="Type">long</span> m);
<span class="Type">long</span> gauss(mat_GF2E& M);
<span class="Type">long</span> gauss(mat_GF2E& M, <span class="Type">long</span> w);
<span class="Comment">// Performs unitary row operations so as to bring M into row echelon</span>
<span class="Comment">// form. If the optional argument w is supplied, stops when first w</span>
<span class="Comment">// columns are in echelon form. The return value is the rank (or the</span>
<span class="Comment">// rank of the first w columns).</span>
<span class="Type">void</span> image(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A);
<span class="Comment">// The rows of X are computed as basis of A's row space. X is is row</span>
<span class="Comment">// echelon form</span>
<span class="Type">void</span> kernel(mat_GF2E& X, <span class="Type">const</span> mat_GF2E& A);
<span class="Comment">// Computes a basis for the kernel of the map x -> x*A. where x is a</span>
<span class="Comment">// row vector.</span>
<span class="Comment">// miscellaneous:</span>
<span class="Type">void</span> clear(mat_GF2E& a);
<span class="Comment">// x = 0 (dimension unchanged)</span>
<span class="Type">long</span> IsZero(<span class="Type">const</span> mat_GF2E& a);
<span class="Comment">// test if a is the zero matrix (any dimension)</span>
<span class="Comment">// operator notation:</span>
mat_GF2E <span class="Statement">operator</span>+(<span class="Type">const</span> mat_GF2E& a, <span class="Type">const</span> mat_GF2E& b);
mat_GF2E <span class="Statement">operator</span>-(<span class="Type">const</span> mat_GF2E& a, <span class="Type">const</span> mat_GF2E& b);
mat_GF2E <span class="Statement">operator</span>*(<span class="Type">const</span> mat_GF2E& a, <span class="Type">const</span> mat_GF2E& b);
mat_GF2E <span class="Statement">operator</span>-(<span class="Type">const</span> mat_GF2E& a);
<span class="Comment">// matrix/scalar multiplication:</span>
mat_GF2E <span class="Statement">operator</span>*(<span class="Type">const</span> mat_GF2E& a, <span class="Type">const</span> GF2E& b);
mat_GF2E <span class="Statement">operator</span>*(<span class="Type">const</span> mat_GF2E& a, GF2 b);
mat_GF2E <span class="Statement">operator</span>*(<span class="Type">const</span> mat_GF2E& a, <span class="Type">long</span> b);
mat_GF2E <span class="Statement">operator</span>*(<span class="Type">const</span> GF2E& a, <span class="Type">const</span> mat_GF2E& b);
mat_GF2E <span class="Statement">operator</span>*(GF2 a, <span class="Type">const</span> mat_GF2E& b);
mat_GF2E <span class="Statement">operator</span>*(<span class="Type">long</span> a, <span class="Type">const</span> mat_GF2E& b);
<span class="Comment">// matrix/vector multiplication:</span>
vec_GF2E <span class="Statement">operator</span>*(<span class="Type">const</span> mat_GF2E& a, <span class="Type">const</span> vec_GF2E& b);
vec_GF2E <span class="Statement">operator</span>*(<span class="Type">const</span> vec_GF2E& a, <span class="Type">const</span> mat_GF2E& b);
<span class="Comment">// assignment operator notation:</span>
mat_GF2E& <span class="Statement">operator</span>+=(mat_GF2E& x, <span class="Type">const</span> mat_GF2E& a);
mat_GF2E& <span class="Statement">operator</span>-=(mat_GF2E& x, <span class="Type">const</span> mat_GF2E& a);
mat_GF2E& <span class="Statement">operator</span>*=(mat_GF2E& x, <span class="Type">const</span> mat_GF2E& a);
mat_GF2E& <span class="Statement">operator</span>*=(mat_GF2E& x, <span class="Type">const</span> GF2E& a);
mat_GF2E& <span class="Statement">operator</span>*=(mat_GF2E& x, GF2 a);
mat_GF2E& <span class="Statement">operator</span>*=(mat_GF2E& x, <span class="Type">long</span> a);
vec_GF2E& <span class="Statement">operator</span>*=(vec_GF2E& x, <span class="Type">const</span> mat_GF2E& a);
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