English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Given two closed oriented manifolds $M,N$ of the same dimension, we denotethe set of degrees of maps from $M$ to $N$ by $D(M,N)$. The set $D(M,N)$ alwayscontains zero. We show the following (non-)realisability results:  (i) There exists an infinite subset $A$ of $\mathbb Z$ containing $0$ whichcannot be realised as $D(M,N)$, for any closed oriented $n$-manifolds $M,N$.  (ii) Every finite arithmetic progression of integers containing $0$ can berealised as $D(M,N)$, for some closed oriented $3$-manifolds $M,N$.  (iii) Together with $0$, every finite geometric progression of positiveintegers starting from $1$ can be realised as $D(M,N)$, for some closedoriented manifolds $M,N$.

Realising sets of integers as mapping degree sets