6.26.3 Can you answer these questions?

6.26.3.1 Using abbreviation commands in glosses

https://tex.stackexchange.com/landing/r/digest?cta=question&id=546653

The package xspace allows for the definition of abbreviations like \NOM: 
\newcommand{\NOM}{\textsc{nom}\xspace} 
\xspace makes it possible to use \NOMin the text without a {}following the \NOM.  ... 
[linguistics] [xspace] [cgloss4e]
 

asked by Stefan MA~\274ller https://tex.stackexchange.com/landing/r/digest?cta=user&id=18561 1 vote

6.26.3.2 pgfmath fail to access the item of array that has only one item

https://tex.stackexchange.com/landing/r/digest?cta=question&id=547328

Sometimes there is only one item in the array list, and array access operator seems to get only the first character of the element in this case. How to fix it? 
\documentclass[tikz,  ... 
[tikz-pgf] [pgfmath]
 

asked by ZhiyuanLck https://tex.stackexchange.com/landing/r/digest?cta=user&id=201158 1 vote

6.26.3.3 Ampersand after multicolumn?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=546561

I am not sure I understand the rules re-placing an ampersand after a multicolumn command in a tabular environment. 
Here is a simple example that should demonstrate the different behavior, with and  ... 
[tables]
 

asked by Yossi Gil https://tex.stackexchange.com/landing/r/digest?cta=user&id=3391 1 vote

answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 0 votes