Mathematical Journal on Logic and Set Theory

Why do you want a journal? They characteristically publish advanced research level papers.

If you want to learn some logic and set theory, even at grad level, start with some good books. You can download a study guide making suggestions about what to read at https://logicmatters.net/tyl. And, shocking to say, every book mentioned in the guide is available online at the usual PDF repositories. :)

Let $X=\{a,b,c,d\}$. Find the connected component $C(a)=\bigcup \{A \mid a \in A , A \subset X, \text{$A$ connected}\}$.

How many ordered pairs $(A,B)$, where $A ,B$ are subsets of $\{1,2,3,4,5\}$, are there if |$A|+|B|=4$?

Find the area of the quadrangular region $ABNH $

Intuition & Proof of rank(AB) $\le$ min{rank(A), rank(B)} (without inverses or maps) [Poole P217 3.6.59, 60]

Let R be a ring and f: M→N is an R-homomorphism. [closed]

Finite coverings and Tangent bundles

If $(\mathcal F_1,\mathcal F_2,\mathcal F_3)$ is independent, is $\mathcal F_1\vee\mathcal F_2$ independent of $\mathcal F_3$?

Determining whether a sequence is a "raikage" sequence beforehand

Trust Region Method

In how many permutations of $\{A,B,C,D,E,a,b,c,d,e\}$ does $A$ always come before all lowercase letters?

Can someone explain Euclid's Book 1 Definition 7, 8, and 9?

Comparison of Topologies via Closed Sets