POS and SOP

Question

when we can say POS and SOP are same ?

Comments

SOP and POS for a given function are always equivalent. you can convert one to another.

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if we use some don't cares in minimal sop then , the pos form may or may not be equivalent .

Answer 1

Both are equivalent But when we use the don't cares in the minimization then they may or may not be equal. so if a question is asking for pos forma and the sop form is involving don't cares . so with the zero instead of complement. else may get another answer.

Answer 2

pos and sop can be interconverted to each other

and thus GENERALLY LOOKS LIKE THEY ARE NOT SAME

but what if there is a single term with single variable function??

 

example:  f(A,B,C,D)=A

SOP AND POS WILL BE A only

clearly its SAME

Answer 3

POS cannot same with SOP

Only conversion of POS and SOP is possible

Comments

$SOP_{A}= POS_{A'}$

$SOP_{A'}= POS_{A}$

correct ???