# Studies of Euler diagrams/blightless

One could say, that only blightless functions are interesting, and deserve to be drawn as Euler diagrams.

For the whole geometric analysis, only those with a single bundle are interesting.

Eventually these pages should show an example for each BEC with arity up to 4.

## 3-ary[edit | edit source]

Of the 22 BECs with arity up to 3 there are 16 whose actual arity is 3.

5 of them are blighted, and 11 are blightless. 5 of them have multiple bundles, and 6 have only one.

### multi-bundle[edit | edit source]

### bundles[edit | edit source]

## 4-ary[edit | edit source]

Of the 402 BECs with arity up to 4 there are 380 whose actual arity is 4.

37 of them are blighted, and 343 are blightless. 51 of them have multiple bundles, and 292 have only one.

### multi-bundle[edit | edit source]

34, 40, 77, 108, 117, 127, 214, 296, 297, 333, 347

### bundles[edit | edit source]

61, 84, 109, 116, 146, 157, 203, 220, 270, 271, 272, 281, 282, 306, 312, 317, 321, 346, 349, 353 374, 383, 384