Mrthdrb

I am trying to create a presentation in latex and have the following

documentclass[11pt]beamer
usethemeMadrid
usepackage[utf8]inputenc
usepackage[T1]fontenc
usepackage[english]babel
usepackagegraphicx
authorAnthony Robinson
titleIrrational and Transcendental Numbers
subtitleMathematics Project
%logo
instituteUniversity of Lincoln School of Maths and Physics
dateApril 30, 2019
%subject
%setbeamercoveredtransparent
%setbeamertemplatenavigation symbols

begindocument

 maketitle

 beginframeSummary
 beginitemize
 item A rational number is a number which can be expressed in the form $fracab$ for $a,bin mathbbZ$. If a number cannot be expressed in this form it is said to be irrational, e.g. $sqrt2$ or $pi$.
 item An algebraic number is a number that can be expressed as the root of a polynomial with integer coefficients, i.e. if a number $z$ is the root of $$a_0 + a_1x + a_2x^2 + a_3x^3 +dots+a_nx^n=0 quad textwherequad a_i in mathbbZforall i$$ the $z$ is said to be algebraic of degree $n$. If a number is not algebraic then it is said to be transcendental. 
 enditemize
 endframe

 beginframeImportant note
 It is possible for a number to be irrational but not transcendental, e.g. $sqrt2$ is irrational (this is proved later) but is algebraic as it is the root of the polynomial $x^2-2=0$.
 endframe

 beginframeImportant Results

 endframe

enddocument

The problem is that in the output of the slide, in the banner at the bottom, it displays a bracket, (, and then "University of Lincoln".

How do I get rid of the bracket, or get rid of the "University of Lincoln" bit.

This is the first time I have tried to create a presentation in latex so any help is greatly appreciated.

Thank-you in advance

You asked,

How do I get rid of ... the "University of Lincoln" bit [in the banner line]?

You need to change

instituteUniversity of Lincoln School of Maths and Physics

to

institute[]University of Lincoln School of Maths and Physics

By default, the "short" version of the institute-related information is equal to the material in curly braces, i.e., the main argument of institute. The optional short version is what's placed in square brackets. By placing nothing inside the square brackets, nothing gets passed to the banner line shown at the bottom of the page.

The following screenshot shows the banner line once the document is recompiled:

The Madrid theme uses the infolines outer theme in which the contents of the footline are defined. In the original definition (copied from beamerouterthemeinfolines.sty you can find the following line:

beginbeamercolorbox[wd=.333333paperwidth,ht=2.25ex,dp=1ex,center]author in head/foot%
usebeamerfontauthor in head/footinsertshortauthorexpandafterifblankexpandafterbeamer@shortinstitute~~(insertshortinstitute)

that inserts the author name and the institute's name into the leftmost colored box in the footline.

In order to remove the institute's name you can redefine the footline as follows:

documentclass[11pt]beamer
usethemeMadrid
usepackage[utf8]inputenc
usepackage[T1]fontenc
usepackage[english]babel
usepackagegraphicx
authorAnthony Robinson
titleIrrational and Transcendental Numbers
subtitleMathematics Project
%logo
instituteUniversity of Lincoln School of Maths and Physics
dateApril 30, 2019
%subject
%setbeamercoveredtransparent
%setbeamertemplatenavigation symbols

makeatletter
setbeamertemplatefootline

 leavevmode%
 hbox%
 beginbeamercolorbox[wd=.333333paperwidth,ht=2.25ex,dp=1ex,center]author in head/foot%
 usebeamerfontauthor in head/footinsertshortauthorexpandafter
 endbeamercolorbox%
 beginbeamercolorbox[wd=.333333paperwidth,ht=2.25ex,dp=1ex,center]title in head/foot%
 usebeamerfonttitle in head/footinsertshorttitle
 endbeamercolorbox%
 beginbeamercolorbox[wd=.333333paperwidth,ht=2.25ex,dp=1ex,right]date in head/foot%
 usebeamerfontdate in head/footinsertshortdatehspace*2em
 usebeamertemplatepage number in head/foothspace*2ex 
 endbeamercolorbox%
 vskip0pt%

makeatother

begindocument

 maketitle


enddocument