Definition and the required condition to define it

Definition and the condition required

Global Maximum and Minimum and the required condition

Definition Condition for continuity

Nitrogen fixation by organism requires conditions that are

Nitrogen fixation by organism requires conditions that are

The chemical and the reaction conditions required for the preparation of ethane are

Under what conditions, the Bragg's equation wl fail to define a crystal ?

Some reactions require conditions like specific temperature, pressure, etc. While writing chemical equations for such reactions, where are these conditions usually mentioned?