0. column-count and column-width are both auto: no multicol, see CSS 2.1
(No example)
1. column-count non-auto, column-width auto: (Gecko) The preferred width of the multicol element is preferred outer width of the content * column-count + column-gap * (column-count - 1)
Lorem ipsum
dolor sit amet,
consectetur adipiscing elit.
Duis id dolor
2. Similarly for the preferred minimum width:
Lorem ipsum
dolor sit amet,
supercalifragilisticexpialidocioussupercalifragilisticexpialidocious
Duis id dolor
3. column-count auto, column-width non-auto: (Gecko) The preferred width of the multicol element is column-width (there will probably be only one column)
Lorem ipsum
dolor sit amet,
consectetur adipiscing elit.
Duis id dolor
Lorem ipsum
dolor sit amet,
consectetur adipiscing elit.
Duis id dolor
4. The preferred minimum width is the same:
Lorem ipsum
dolor sit amet,
supercalifragilisticexpialidocious
Duis id dolor
Lorem ipsum
dolor sit amet,
supercalifragilisticexpialidocious
Duis id dolor
5. column-count non-auto, column-width non-auto: (Gecko, Opera) The preferred width of the multicol element is column-width * column-count + column-gap * (column-count - 1)
Lorem ipsum
dolor sit amet,
consectetur adipiscing elit.
Duis id dolor
Lorem ipsum
dolor sit amet,
consectetur adipiscing elit.
Duis id dolor
6. The preferred minimum width is the same:
Lorem ipsum
dolor sit amet,
supercalifragilisticexpialidocious
Duis id dolor
Lorem ipsum
dolor sit amet,
supercalifragilisticexpialidocious
Duis id dolor