Comp Sci Why Is Sno, Pno=>Qty, Sname=>Qty in 3NF?

[shivajikobardan]

Homework Statement

3NF third normal form

Relevant Equations

none

Sno,Pno=>Qty
Sname,Pno=>Qty
Sno=>Sname
Sname=>Sno

To be in 3NF, LHS should be super key and RHS should be non-prime attribute.
It holds true for first 2 FDs. But for the last two, it doesn't hold true. So, why is it in 3NF?
chatGPT says it holds true for all FDs, but I can't see how.

 

[jedishrfu]

The last two look like lookup tables to translate between sno and sname. Given sno I can find sname and given sname I can find sno.

 

[pbuk]

Homework Statement:: 3NF third normal form
Relevant Equations:: none

Sno,Pno=>Qty
Sname,Pno=>Qty
Sno=>Sname
Sname=>Sno

This is impossible to answer without knowledge of what data are contained in the columns, however assuming Sname represents a person's name, and given the fact that two people can have the same name what do you think about your statement that Sname,Pno=>Qty is in 3NF?