say A is:

A=\left \{ \left \{ a \right \}, \left \{ a,b \right \}\right \}

and R being:

R=\left \{( \left \{ a \right \},\left \{ a \right \}), (\left \{ a,b \right \},\left \{ a,b \right \}),(\left \{ a \right \},\left \{ a,b \right \}) \right \}

and let's say the relation is "subset of" (if it matters).

is this count as a linear order relation?

TIA!