@@ -143,6 +143,8 @@ which is its address. The root of the tree is `1`. If the
143address of a cell is `n`, the address of its head is `2n` and the
143address of a cell is `n`, the address of its head is `2n` and the
144address of its tail is `2n+1`.
144address of its tail is `2n+1`.
146A picture might help:
148A picture might help:
@@ -425,7 +427,7 @@ Finally, let's use this thing:
425 {@rs @ud}
427 {@rs @ud}
426[.6.28 42]
428[.6.28 42]