@Adám how can I make stencil output matrices on a column rather than a row? (each under the other, and not side by side)

Also, are stencil stuff on topic here?

@Uriel You mean the language?

@Adám yup

@Uriel The ≡ option will output matrices with empty lines in between.

@Adám thanks!

@Adám hmm but it can't coexist with the exist option

@Uriel you shouldn't need both. The only difference (other than the display) is that ≡ goes forever if needed, while ∊ stops when it detects a cycle.

@Adám does it mean I can't use column view with the exist option?

It turns messy if the result gets over a few matrices