Which data center in Frankfurt am Main is 1km as the crow flies from the central computer of the stock exchange

Which data center (colocation) in Frankfurt am Main is meant in the 1km as the crow flies to the central computer of the Frankfurt Stock Exchange in the German YouTube video?

Hello everybody,

I'm interested in which computer center in Frankfurt am Main is meant in the following German YouTube video. Which data center is the nearest (1 km as the crow flies) from the central computer of the Frankfurt Stock Exchange to the data center with the lowest latency. Again, with defined cable lengths to provide the same latency for everyone.

Here is the YouTube video:

YouTube position: 21:44

Look forward to your answers.

Best regards
Sven

Networking – Cloud-based (Central) VPN Options?

I have a server in a location where port forwarding due to network NAT can not be used.

I need to access this server remotely, so I've been thinking about using a cloud-based VPN.

Connect my server to the cloud-based VPN, and then connect my remote client to the same cloud-based VPN.

Theoretically, should the two see each other?

P.S. I do not want to host the server online because I do not want it to be connected to the Internet because of sensitive data on this server.

It's been a while since I played around with VPN options … and even then it was site-to-site.

Any ideas, what could work?

Many Thanks

Central Administration – This operation can only be performed on a computer that is added to a server farm by users with permissions in SQL Server

This operation can only be performed on a computer that is connected by users to a server farm that has permissions to read from the configuration database in SQL Server.

I get this error when accessing the central administrator after restarting the server in production.

Checked SQL services – executed;
validated permission for farm account in databases – sys admin in SQL Server;
The password for the farm account never expires.
no default gateway change in the web server;
Firewall disabled

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Positivity of q-analogues of central binomial coefficients?

With the usual $ q- $notations
$[n]_q = 1 + q + cdots + q ^ {n-1} = frac {, , 1-q ^ n} {1-q}, $
$[n]_q! =[1]_q[2]_q cdots[n]_q $ and
$ binom {n} k_q = frac {[n]_q!} {[k]_q! cdot[n-k]_q!} $
To let
$$ b (n, k, r, q) = det left (q ^ {r binom {i-j} 2} frac {[2i+k+1]_q} {[i+j+k]_q} binom {i + j + k} {i-j + 1} _q right) _ {i, j = 0} ^ {n-1}. $$

You can show that $ b (n, k, 1, q) = binom {2n + k-1} {n} _q. $ That's why $ b (n, k, 1, q) $ has positive coefficients as polynomial in $ q $ for every positive integer $ k. $

Calculations suggest that too $ b (n, k, 0, q) $ and $ b (n, k, 2, q) = q ^ {n (n + k-1)} b (n, k, 0,1 / q) $ have positive coefficients.

Any idea how to prove that?

Representation Theory – Expression of $ sum_ {g in [G/H]} ge_Hg ^ {- 1} in Z ( mathbb {C}[G]) $ in terms of primitive central Idempotent?

Accept $ G $ is a finite group and $ H $ a subgroup. For a non-reducible character $ chi $ from $ G $In the group algebra there is a central idempotent $ mathbb {C}[G]$:
$$
e_ chi = frac { chi (1)} {| G |} sum_ {g in G} chi (g ^ {- 1}) g.
$$

I write $ e_H: = e_ {1_H} = frac {1} {| H |} sum_ {h in H} h $ for the idempotent in $ mathbb {C}[H]$ according to the trivial sign $ H $, If $[G/H]$ denotes a complete set of left Cos representatives of $ H $ in the $ G $then build the element
$$
sum_ {g in [G/H]} ge_Hg ^ {- 1}
$$

is centrally located in $ mathbb {C}[G]$, Is there a way to explicitly extract something which characters in this linear combination have the corresponding central idempotents and / or their multiplicity? Just look at the Mackey formula and since then $ ge_Hg ^ {- 1} = e_ {gHg ^ {- 1}} $My guess is that it can be characters that are components of $ operatorname {Ind} ^ G_H (1_H) $or something similar, but I'm not sure.

dns – Check a root domain in Google Search Console (or Webmaster Central) if the HTTP URL has already been verified

While uploading my SSL certificate to Google Cloud, there are some issues.
It says that "You are not an authorized domain owner for this certificate." However, I have already validated the property for my http: // domain
I am currently switching to Namecheap and can not use the DNS method (since I have custom name servers on my current Google Cloud registrar).

What would be the best thing to do? Many thanks for your help.

Webmaster central proof of ownership