The method of ‘least squares’, which falls under the category of weighted residual processes, is applied as a time‐stepping algorithm to one‐dimensional transient problems including the heat conduction equation, diffusion‐convection equation, and a non‐linear unsaturated flow equation. Comparison is made with other time‐stepping algorithms, and the least squares method is seen to offer definite advantages.
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Lewis et al. (1974) studied this question.
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