I have the following expression, involving the Meijer G-Function:
$$\frac{1}{\sqrt{a} (2 \pi)^{(a-1)/2}} G_{1,a+1}^{a+1,1}\left( \frac{c^a}{a^a} \left|\begin{matrix}0\\ 0,0,\frac{1}{a},\frac{2}{a},\dots,\frac{a-1}{a}\end{matrix}\right.\right)$$
Here $a \in \mathbb{N},~c>0$.
I believe this can be simplified, using the misterious 'duplication formula' from this paper, top of page 3.
It's really too long to type so I'll reproduce the relevant parts of the paper on this screenshot:
As you can see this looks exactly like my case. I would really like your help in figuring out how to simplify my expression so it looks like the left hand side in the Theorem above.
Edit
Also from Wikipedia https://en.wikipedia.org/wiki/Meijer_G-function#Basic_properties_of_the_G-function
$$\delta =m+n-{\tfrac {1}{2}}(p+q)$$
$$\nu =\sum _{j=1}^{q}b_{j}-\sum _{j=1}^{p}a_{j}$$
$$G_{p,q}^{\,m,n}\!\left(\left.{\begin{matrix}\mathbf {a_{p}} \\\mathbf {b_{q}} \end{matrix}}\;\right|\,z\right)={\frac {h^{1+\nu +(p-q)/2}}{(2\pi )^{(h-1)\delta }}}\; \times \\ \times G_{hp,\,hq}^{\,hm,\,hn}\!\left(\left.{\begin{matrix}a_{1}/h,\dots ,(a_{1}+h-1)/h,\dots ,a_{p}/h,\dots ,(a_{p}+h-1)/h\\b_{1}/h,\dots ,(b_{1}+h-1)/h,\dots ,b_{q}/h,\dots ,(b_{q}+h-1)/h\end{matrix}}\;\right|\,{\frac {z^{h}}{h^{h(q-p)}}}\right)$$
$$\quad h\in \mathbb {N}$$
This seems to be more clear, I'll get some sleep and figure it out.