Vocabulary/amprank

       result of u&:v                                   result of u&v
             ^                                                ^
             |                                                |
             |                                                |
    +------------------+                                  collect results
    |     apply        |                                  and add fill
    |       u          |                                   ^ ^ ^ ^
    |    on entire     |                                   | | | |  result cells
    |   result of v    |                                   | | | |  of u
    +------------------+                                   | | | |
      ^              ^                            +----------------------+
      |              |                            |         apply        |
      |              |                            |           u          |
   collect        collect                         |        on each       |
   results        results                         |    result cell of v  |
   and add        and add                         +----------------------+
    fill           fill                            ^ ^ ^ ^        ^ ^ ^ ^
   ^ ^ ^ ^        ^ ^ ^ ^                          | | | |        | | | |   result cells
   | | | |        | | | |   result cells           | | | |        | | | |   of v
   | | | |        | | | |   of v                   | | | |        | | | |
 +---------+    +---------+                      +---------+    +---------+
 |  apply  |    |  apply  |                      |  apply  |    |  apply  |
 |    v    |    |    v    |                      |    v    |    |    v    |
 | on each |    | on each |                      | on each |    | on each |
 |  cell   |    |  cell   |                      |  cell   |    |  cell   |
 +---------+    +---------+                      +---------+    +---------+
   ^ ^ ^ ^        ^ ^ ^ ^                          ^ ^ ^ ^        ^ ^ ^ ^
   | | | |        | | | |                          | | | |        | | | |
   | | | |        | | | |                          | | | |        | | | |
   | | | |        | | | |                          | | | |        | | | |
 split x into   split y into                     split x into   split y into
    cells          cells                            cells          cells
      ^              ^                                ^              ^
      |              |                                |              |
     [x]             y                               [x]             y