Armor+h/s in pvp?

[Zerious]

In simple terms, yes I would say that is how you calculate damage. I'm certain it's actually way more complicated than that though, not to mention all the minimum stuff.

armor in pvp subtracts 90% of your armor in damage

ie: 50 armor blocks 45 damage, 100 armor plocks 90 damage, 10 armor blocks 9 damage. 49 blocks 44 damage (because the game always rounds fractions down)