# Why can’t I view an indexed collection of subsets by typing display {k in SS} POW\[k\]?

**URL:** <https://discuss.ampl.com/t/why-can-t-i-view-an-indexed-collection-of-subsets-by-typing-display-k-in-ss-pow-k/51>\
**Category:** FAQs\
**Tags:** displays-results\
**Created:** [December 15, 2021, 5:26pm UTC](https://discuss.ampl.com/t/why-can-t-i-view-an-indexed-collection-of-subsets-by-typing-display-k-in-ss-pow-k/51 "2021-12-15T17:26:39Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![megrobert](https://avatars.discourse-cdn.com/v4/letter/m/d07c76/32.png) [@megrobert](https://discuss.ampl.com/u/megrobert)\
**Post date:** [December 15, 2021, 5:26pm UTC](https://discuss.ampl.com/t/why-can-t-i-view-an-indexed-collection-of-subsets-by-typing-display-k-in-ss-pow-k/51/1 "2021-12-15T17:26:39Z")

</div>

The display command does not currently recognize `{k in SS} POW[k]` where `POW` is an indexed (subscripted) set. For this elementary case, you can exhibit the whole indexed collection of subsets by giving just the name of the collection:

```auto
display POW;

```

You can also exhibit each of the indexed sets separately, by using the iterated form of the `display` command; it resembles the ordinary form, but with a colon after the index set:

```auto
display {k in SS}: POW[k];

```

This gives the same output as if you had typed a separate statement `display POW[k]` for each member `k` of `SS` . Any set expression (or list of expressions) may follow the colon.