# Dr Jonathan Elmer

Name | Dr Jonathan Elmer |
---|---|

Job title | Senior Lecturer in Mathematics |

Research institute | |

Primary appointment | Design Engineering & Mathematics |

Email address | j.elmer@mdx.ac.uk |

ORCID | https://orcid.org/0000-0001-5296-1987 |

Contact category | Researcher |

## Biography

**Biography**

*I joined Middlesex as a lecturer in Mathematics in 2016. Previously I held teaching positions at the University of Aberdeen (2012-2015) and University of Bristol (2010-2012). Before that I held research posts at RWTH Aachen (2008-2009) and the University of Aberdeen (2007-2008). *

**Teaching**

*I am module leader for the following courses:*

*MSO0201 Foundation Mathematics (Psych)*

*MSO0204 Foundation Mathematics (Law)*

*MSO1125 Mathematical Thinking*

*MSO2115 Abstract Algebra*

*MSO3115 Rings and Fields*

*MSO3450 Cryptography and Blockchain*

*I am supervising one PhD student: Kazal Kadr, who began her studies in October 2019.*

## Employment

## Education and qualifications

Thesis title "Symmetric algebras and the depth of modular invariant rings"

Supervised by Prof. Peter Fleischmann

## Grants

Award of £29,461. To be used to pay 20% salary for 12 months, Jan 2022-Jan2023, plus travel expenses.

## Prizes and Awards

## Research outputs

### The separating variety for matrix semi-invariants

Elmer, J. 2023. The separating variety for matrix semi-invariants.*Linear Algebra and its Applications.*674, pp. 466-492. https://doi.org/10.1016/j.laa.2023.06.012

### The separating variety for 2 x 2 matrix invariants

Elmer, J. 2024. The separating variety for 2 x 2 matrix invariants.*Linear and Multilinear Algebra.*72 (3), pp. 389-411. https://doi.org/10.1080/03081087.2022.2158300

### Modular covariants of cyclic groups of order p

Elmer, J. 2022. Modular covariants of cyclic groups of order p.*Journal of Algebra.*598, pp. 134-155. https://doi.org/10.1016/j.jalgebra.2022.01.015

### The relative Heller operator and relative cohomology for the Klein 4-group

Elmer, J. 2022. The relative Heller operator and relative cohomology for the Klein 4-group.*Communications in Algebra.*50 (4), pp. 1518-1534. https://doi.org/10.1080/00927872.2021.1984496

### Degree bounds for modular covariants

Elmer, J. and Sezer, M. 2020. Degree bounds for modular covariants.*Forum Mathematicum.*32 (4), pp. 905-910. https://doi.org/10.1515/forum-2019-0196

### Locally finite derivations and modular coinvariants

Elmer, J. and Sezer, M. 2018. Locally finite derivations and modular coinvariants.*Quarterly Journal of Mathematics.*69 (3), pp. 1053-1062. https://doi.org/10.1093/qmath/hay013

### Symmetric powers and modular invariants of elementary abelian p-groups

Elmer, J. 2017. Symmetric powers and modular invariants of elementary abelian p-groups.*Journal of Algebra.*492, pp. 157-184. https://doi.org/10.1016/j.jalgebra.2017.07.020

### On separating a fixed point from zero by invariants

Elmer, J. and Kohls, M. 2017. On separating a fixed point from zero by invariants.*Communications in Algebra.*45 (1), pp. 371-375. https://doi.org/10.1080/00927872.2016.1175465

### Zero-separating invariants for linear algebraic groups

Elmer, J. and Kohls, M. 2016. Zero-separating invariants for linear algebraic groups.*Proceedings of the Edinburgh Mathematical Society.*59 (4), pp. 911-924. https://doi.org/10.1017/S0013091515000322

### Zero-separating invariants for finite groups

Elmer, J. and Kohls, M. 2014. Zero-separating invariants for finite groups.*Journal of Algebra.*411, pp. 92-113. https://doi.org/10.1016/j.jalgebra.2014.03.044

### Separating invariants for arbitrary linear actions of the additive group

Dufresne, E., Elmer, J. and Sezer, M. 2014. Separating invariants for arbitrary linear actions of the additive group.*Manuscripta Mathematica.*143 (1), pp. 207-219. https://doi.org/10.1007/s00229-013-0625-y

### On the depth of separating invariants for finite groups

Elmer, J. 2012. On the depth of separating invariants for finite groups.*Beitrage zur Algebra und Geometrie.*53 (1), pp. 31-39.

### Separating Invariants for the Basic G_a actions

Elmer, J. and Kohls, M. 2012. Separating Invariants for the Basic G_a actions.*Proceedings of the American Mathematical Society.*140 (1), pp. 135-146.

### The Cohen-Macaulay property of separating invariants of finite groups

Dufresne, E., Elmer, J. and Kohls, M. 2009. The Cohen-Macaulay property of separating invariants of finite groups.*Transformation Groups.*14 (4), pp. 771-785.

### On the depth of modular invariant rings for the groups C_p x C_p

Elmer, J. and Fleischmann, P. 2009. On the depth of modular invariant rings for the groups C_p x C_p. in: Symmetry and Spaces: in honour of Gerry Schwarz Birkhauser Boston.### Depth and detection in modular invariant theory

Elmer, J. 2009. Depth and detection in modular invariant theory.*Journal of Algebra.*322 (5), pp. 1653-1666. https://doi.org/10.1016/j.jalgebra.2009.04.036

### Associated primes for cohomology modules

Elmer, J. 2008. Associated primes for cohomology modules.*Archiv der Mathematik.*91 (6), pp. 481-485. https://doi.org/10.1007/s00013-008-2902-7

##### 746

total views of outputs##### 114

total downloads of outputs##### 111

views of outputs this month##### 6

downloads of outputs this month