Abstract
Responding to a challenge posed by Frías-Armenta (2020), who gave an example of a contractible graph with thirteen vertices that does not have any gluable edge, we give a similar example with eleven vertices. These examples illustrate that Axiom 3.4 of Ivashchenko (1994) is violated, and so are several follow-up theorems.
| Original language | English |
|---|---|
| Pages (from-to) | 155-159 |
| Number of pages | 5 |
| Journal | Mathematics Student |
| Volume | 90 |
| Issue number | 1-2 |
| State | Published - 1 Jan 2021 |
Bibliographical note
Publisher Copyright:© Indian Mathematical Society, 2021.
Keywords
- Contractible edge
- Contractible graphs
- Contractible transformations
- Contractible vertex
- Gluable edge
- Gluable vertex
ASJC Scopus subject areas
- General Mathematics
- Education