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Possible two-component spin-singlet pairings in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>Sr</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi>RuO</mml:mi></mml:mrow><mml:mn>4</mml:mn></mml:msub></mml:math>
Recent experiments suggest a multicomponent pairing function in ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$, which appears to be inconsistent with the absence of an apparent cusp in the transition temperature ${T}_{c}$ as a function of the uniaxial strain. We show, however, that the theoretical cusp in ${T}_{c}$ for a multicomponent pairing can be easily smeared …