Results for query "TypeError: can&"

jQuery slide doesn't work [closed]

I have a problem with jQuery and I don't know where comes from, here is what is in the console:

Uncaught TypeError: Object [object Object] has no method 'getElement'
script_16.c1=8&c2=2101&c3=1234567891234567891&ns__t=1349547316971&ns_c=ISO-8859-1&c8=&c7=http%3A%2F%2Fdg.

A question about $O(3,1)$

Recall that $O(3,1)$ is the collection of matrices $A\in M_4(\mathbb R)$ such that
$$A\begin{pmatrix}1 &&&\\&1&&\\&&1&\\&&&-1\end{pmatrix}A^T=\begin{pmatrix}1 &&&\\&1&&\\&&1&\\&&&-1\end{pmatrix}.Can we find a $Q\in O(3,1)$ such that
$$Q\psi Q^{-1}=\begin{pmatrix} 0&a&&\\-a&0&&\\&&0&b\\&&b&0\end{pmatrix}$$
for some $a,b\in \mathbb R$?

Is the operadic butterfly symmetric?

The operadic butterfly is a diagram in the category of operads in vector spaces.$$\begin{array}{ccccc}
& Dend & & & & Dias & \newline
\nearrow & &\searrow & &\nearrow & &\searrow\newline
Zinb & & &Ass & & & \quad Leib \newline
\searrow & &\nearrow & &\searrow & &\nearrow\newline
& Comm & & & & Lie & \newline
\end{array}$$

Here is a paper by Loday in which some discussion can be found.