[Avodah] Tachanun

[Rich, Joel]

We paskin tachanun is "reshut" and thus are more liberal in dispensing with saying it.
Question: Is tachanun a din in the individual or the tzibbur or both?
example- you're visiting a friend and daven in a chaddishe minyan on a rebbi's yahrtzeit - do you say tachanun there? after you leave? not at all? is it your choice?

KT
Joel Rich
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