Where does “non-null persistent” come from?

non-null persistent (English) comes from English persistent, from Latin persistēns, from Latin persisto, from Latin sistō, from Proto-Italic sistō, from Proto-Indo-European stísteh₂ti, from Proto-Indo-European steh₂- — to stand.

non-null persistent (English): persistent with finite expected return time

Definitions

  1. persistent with finite expected return time

Ancestry of “non-null persistent”, step by step

non-null persistent traces back through two separate lines of ancestry.

via English persistent

StepLanguageWordMeaning
1EnglishpersistentObstinately refusing to give up or let go;...
2Latinpersistēnspersisting, remaining
3LatinpersistoI persist, continue steadfastly; I remain
4Latinsistōto cause to stand; to set; to place
5Proto-Italicsistōstand; place
6Proto-Indo-Europeanstísteh₂tito be standing up, to be getting up
7Proto-Indo-Europeansteh₂-to stand

via English null

StepLanguageWordMeaning
1EnglishnullA non-existent or empty value or set of values;...
2Middle Frenchnulnobody; no one; none
3Old Frenchnulnobody; no one; none
4Latinnūllusno one, none, not any, nothing
5Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
Every word from Proto-Indo-European steh₂-
non-null persistent — Etymology, Origin & Word History | Etymology Explorer