User:Boris Tsirelson/Sandbox1

(CC) Image: Boris Tsirelson
The graphical user interface started.

The graphical user interface started.

(CC) Image: Boris Tsirelson
The source file is read.

The source file is read.

Definitions are processed; the formulation of the first lemma is being processed.

(CC) Image: Boris Tsirelson
Definitions are processed; the formulation of the first lemma is being processed.

The formulation of the first lemma is processed; the goal is pending.

(CC) Image: Boris Tsirelson
The formulation of the first lemma is processed; the goal is pending.

(CC) Image: Boris Tsirelson
At last, a really serious lemma.

(CC) Image: Boris Tsirelson
The goal.

(CC) Image: Boris Tsirelson
"We have", why?

(CC) Image: Boris Tsirelson
Here is why!

(CC) Image: Boris Tsirelson
Really complicated arguments...

(CC) Image: Boris Tsirelson
Happy end is coming.

(CC) Image: Boris Tsirelson
The theorem is proved.

(CC) Image: Boris Tsirelson
Some options of the Proof General.

(CC) Image: Boris Tsirelson
Isabelle, show us your methods...

(CC) Image: Boris Tsirelson
...and your term bindings...

(CC) Image: Boris Tsirelson
...and the theorems.