Martin Sleziak

Let $A$ be a finite-dimensional algebra over a field $k$. Then any projective module $P$ (not necessarily finitely generated) over $A$ has the following isomorphism: $$ P \cong (Ae_1)^{(m_1)} \oplus (Ae_2)^{(m_2)} \oplus \cdots \oplus (Ae_n)^{(m_n)}, $$ where $\{e_i\}_{1 \leqslant i \leqslant n}$...

Since we have had the ability to track the hot network question (HNQ) list, we have been doing this in a private moderator room. The idea being that it would help us stay on top of potentially problematic questions that need moderator attention before things get out of hand. It has helped, but we...

I see that until recently, there used to be a room called The Outreach Department. It was created in April 2022. It was frozen quite recently, in November 2024. (Actually, this room was frozen and unfrozen a few times in the past.) Is the intention behind this room simply to gather HNQs? (The roo...

Since we have had the ability to track the hot network question (HNQ) list, we have been doing this in a private moderator room. The idea being that it would help us stay on top of potentially problematic questions that need moderator attention before things get out of hand. It has helped, but we...

I see that until recently, there used to be a room called The Outreach Department. It was created in April 2022. It was frozen quite recently, in November 2024. (Actually, this room was frozen and unfrozen a few times in the past.) Is the intention behind this room simply to gather HNQs? (The roo...