How to numerate formulas in Lyx? Is there exist LaTeX command like "\tag "? I haven't found corresponding info before.
When you say formulas, I assume you mean formulas in a display: Insert > Math > Display Formula
(there is a keyboard shortcut, but I don't remember what the default is). These are LaTeX \[ \]
environments, and become \equation
environments upon labeling or numbering.
Once you have inserted your display, you right-click the display and may from there choose to number it or label it for cross-reference. Again, keyboard shortcuts exist.
PS. If you want an \align
environment, Shift + Enter
with the cursor in the display, then number lines (e.g. by right-clicking).
equation
no need to add tags as long as you are satisfied with the automatic numbering. In other case you should use the\tag{}
command loading in the preamble before theamsmath
package. – Aradnix Aug 20 '14 at 0:28