Alternative Equation Formats

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MathML

( f ( Ψ ( k ) )   − f ( Ψ ( k − 1 ) ) ) f ( Ψ ( k − 1 ) ) ≤ r

MathML rendered with MathJax

( f ( Ψ ( k ) )   − f ( Ψ ( k − 1 ) ) ) f ( Ψ ( k − 1 ) ) ≤ r