Hi On 10. 03. 19 20:14, Kent West wrote: > The ">=" surely means "greater than or equal to", but what is "<<"? > "less than or less than"? "<<" means "strictly earlier (i.e. less than)". In other words, it matches versions that sort earlier, but are not equal to the right-hand-side. This is in contrast to "<=" that also matches versions that are equal to the right-hand-side. > Even more interesting is that "aptitude install python3-kivy" only shows > one "<" (which makes sense to me as "less than"): "<" is an obsolete version of "<=" that is no longer allowed in packages that follow recent versions of Debian Policy. > Also, is the answer documented somewhere? I've researched unproductively > for several hours. This is documented in the Debian Policy Manual: https://www.debian.org/doc/debian-policy/ch-relationships.html#syntax-of-relationship-fields See remark [2] on that page regarding "<" vs "<<". Best regards Tomaž
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