Dear Deal.II,

I am a brand new user, but already very excited by the nice coding style —a pleasure to read and learn!— and quite impressed by the performance...I can't wait to be a little more fluent!

And you will see that there is a long way to fluency: here is the most trivial question I can imagine...on which I am stuck since this morning!

In the framework of step-3, after solving the linear system, I would like to calculate the flux on each integration point, store it somewhere so I can after calculate for instance the integral of this field, and then write it to the display file so I can create nice images to make my boss happy. I am pretty sure everyone here does that 2e9 times a day, but I can't figure out by myself. Is there any piece of tutorial out there to help me find my way? Thanks in advance for your precious help.

Best regards,
Martin.
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