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Line 23: We note that :''Z'' = (''x''<sub>1</sub>''y''<sub>1</sub> + ''x''<sub>1</sub>''y''<sub>2</sub> + ''x''<sub>2</sub>''y''<sub>1</sub> + ''x''<sub>2</sub>''y''<sub>2</sub>) - ''x''<sub>1</sub>''y''<sub>1</sub> +- ''x''<sub>2</sub>''y''<sub>2</sub> ::= ''x''<sub>1</sub>''y''<sub>2</sub> + ''x''<sub>2</sub>''y''<sub>1</sub>

Karatsuba algorithm: Difference between revisions