Let $a_n \geq b_n$ where $b_n \leq |c_n|$ with $c_n \to 0$.
Does this imply that $$\liminf a_n \geq 0?$$
These are all real-valued sequences. I don't think it is enough to conclude.
Let $a_n \geq b_n$ where $b_n \leq |c_n|$ with $c_n \to 0$.
Does this imply that $$\liminf a_n \geq 0?$$
These are all real-valued sequences. I don't think it is enough to conclude.
Of course not. Take the constant sequences $a_n = b_n = -1$ and $c_n = 0$ for all $n$.