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Biconjugate gradient stabilized method
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<p>In <a href="/facts/Numerical_linear_algebra/jnS6Tteb">numerical linear algebra</a>, the biconjugate gradient stabilized method, often abbreviated as BiCGSTAB, is an <a href="/facts/Iterative_method/uKMAJhEh">iterative method</a> developed by <a href="/facts/Henk_van_der_Vorst/PKlfcAfG">H. A. van der Vorst</a> for the numerical solution of nonsymmetric <a href="/facts/System_of_linear_equations/fk9CFdgp">linear systems</a>. It is a variant of the <a href="/facts/Biconjugate_gradient_method/m1n1pSla">biconjugate gradient method</a> (BiCG) and has faster and smoother convergence than the original BiCG as well as other variants such as the <a href="/facts/Conjugate_gradient_squared_method/LmURqmPX">conjugate gradient squared method</a> (CGS). It is a <a href="/facts/Krylov_subspace/wtr5EXn6">Krylov subspace</a> method. Unlike the original BiCG method, it doesn't require multiplication by the transpose of the system matrix. </p>