Is it possible to perform supremum with two parameters in the same function?

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SUMMARY

The discussion confirms that it is indeed possible to perform the supremum operation with two parameters in the same function, expressed as sup_(x,y) f(x,y) = sup_y sup_x f(x,y). This conclusion is supported by a proof provided in a linked Math Stack Exchange discussion. The clarity of this mathematical operation allows for efficient evaluation of functions with multiple variables.

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St41n
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Can I do this:

sup_(x,y) f(x,y) = sup_y sup_x f(x,y) ?
 
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Great thanks for quick reply!
 

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