Abstract Given modules $ A_ {R} $ and $ _ {R} B $, $ _ {R} B $ is called absolutely $ A_ {R}
$-pure if for every extension $ _ {R} C $ of $ _ {R} B $, $ A\otimes B\rightarrow A\otimes C …

Given modules AR and RB, RB is called absolutely AR-pure if for every extension RC of RB,
A⊗ B→ A⊗ C is a monomorphism. The class Fl− 1 (AR)={RB: RB is absolutely AR-pure} is …

Given modules AR and RB, RB is called absolutely AR-pure if for every extension RC of RB,
ABAC is a monomorphism. The class Fl-1 (AR)={RB: RB is absolutely AR-pure} is called the …