6.10.3 Can you answer these questions?

6.10.3.1 Export Large Sparse Matrix As .mtx File

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223991

I'm trying to export a large sparse matrix of dimension 1164960 by 1164960 with 17815680 elements as an .mtx file so I can import it into Python. I first the run the following code successfully. 
 
s1  ... 
[matrix] [export] [data]
 

asked by Daniel Berkowitz https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27536 1 vote

6.10.3.2 What are "VariableReplacementDump" and "TranscendentalDump"?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223879

I have run into a Mathematica object I've never seen before and Googling those reveals nothing. I'm talking about VariableReplacementDump and TranscendentalDump. Here's how I got these: 
 
Clear[q, f,  ... 
[equation-solving] [complex]
 

asked by Lokdal https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=23117 1 vote

6.10.3.3 Why doesn't Mathematica provide an answer while Wolfram Alpha does, concerning a series convergence?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224072

Among other series I've been working on, I was asked to find whether 
$$\sum_n 1-\cos(\frac{\pi}{n})$$ 
converged, and Mathematica's output to SumConvergence[1 - Cos[Pi/n], n] simply was repeating the  ... 
[series-expansion] [wolfram-alpha-queries] [convergence]
 

asked by Hal https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=73083 1 vote