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Now you are in the subtree of Lecture Notes public knowledge tree. 

1.7. Аксиоматика множества действительных чисел

Export

Export will produce a single file with all the subgraph content. It will have *.html extension and will be viewable with/printable from your browser. The source text (except for a few html tags) will remain in markdown, just as you created it. You can convert it easily into format of your choosing, for details see Export from Knowen node.