Drilling down syntax

Drilling down syntax

Hello,

I am reading from a jQuery ebook and I came across this syntax:
$("div>ul a"); $("div#main p strong"); $("div.main p>li a");

My question is regarding the > and then sometimes a space then another
html tag like p or strong etc.

Can
$("div.main p>li a");
be rewritten as:
$("div.main>p>li>a"); // ? is this the same?

Does a space as in
$("div#main p strong"); // mean $("div#main>p>strong");

Thanks,
Jim