Math & Science ⇒ Too small Fractions in Array

[krabby]

Hi,

I have this code.

Code: Select all

\[
  \lambda = \left\{
  \begin{array}{ll}
    \frac{64}{Re}, & Re <= 2300 \\
    \frac{0,3164}{\sqrt[4]{Re}}, & Re > 2300
  \end{array}
  \right. .
\]

The output is just fine. But the fractions are very small. How can I enlarge them so that they look like normal sized formulas.

A screenshot of the current output is attached.

Thank you

[Johannes_B]

Can you please edit your post by preparing a Minimal Working example using the code button?

This ensures, that we all can test and modify your example and finally see the same output (Open in WriteLaTeX).

[localghost]

In the {array} environment fractions by default are typeset in text style. You can force display style by various measures.

• Use \dfrac from amsmath instead of the usual \frac command.
• Use the array package to enable \displaystyle for each column of the {array} environment. For details refer to the manual.
• Enable \displaystyle in each cell of the {array} environment.

Since you want to typeset a case differentiation, you should consider the following possible approaches.

• The cases environment from amsmath.
• Enhancements of this cases environment by cases or mathtools. The corresponding manuals have the details.
• A completely different approach by using the structures of the empheq package.

Further reading:

• The »Math mode« document

Thorsten

[krabby]

In the {array} environment fractions by default are typeset in text style. You can force display style by various measures.

• Use \dfrac from amsmath instead of the usual \frac command.
• Use the array package to enable \displaystyle for each column of the {array} environment. For details refer to the manual.
• Enable \displaystyle in each cell of the {array} environment.

Since you want to typeset a case differentiation, you should consider the following possible approaches.

• The cases environment from amsmath.
• Enhancements of this cases environment by cases or mathtools. The corresponding manuals have the details.
• A completely different approach by using the structures of the empheq package.

Further reading:

• The »Math mode« document

Thorsten

Thanks ! Worked for me

[Johannes_B]

Would you consider posting your preferred solution, so others can see when having a similar question?