Problema de secuencia de control indefinida

Problema de secuencia de control indefinida

Tengo el siguiente código:

\title{Improvement of the Cascadic Multigrid Algorithm with a Gauss Seidel 
Smoother to Efficiently Compute the Fiedler Vector of a Graph Laplacian}
\author{Shivam Gandhi \href{email: [email protected]}
   \and \href{Tufts University Department of Mathematics}}
\date{November 2015}

Sin embargo, devuelve el siguiente error:

Undefined control sequence.
\@author ->Shivam Gandhi \href 
                               {email: [email protected]} \and \href ...
l.19 \maketitle

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

Estoy usando ShareLaTeX para escribir el artículo, por lo que puede ser el compilador. alguna idea en como solucionar este problema?

Gracias.

Respuesta1

Quizás quieras algo como esto

\documentclass[a4paper]{article}
\usepackage{hyperref}
\begin{document}
\title{Improvement of the Cascadic Multigrid Algorithm with a Gauss Seidel 
Smoother to Efficiently Compute the Fiedler Vector of a Graph Laplacian}
\author{Shivam Gandhi
  \href{mailto:[email protected]}{[email protected]}
  \and \href{http://math.tufts.edu/}{Tufts University Department of Mathematics}}
\date{November 2015}
\maketitle
\end{document}

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