# Infinitesimal neighbourhood of a line congruence

### Model 281

### Description

280-282: The types of infinitesimal neighbourhood of a line in a congruence of lines (infinitely thin bundle of lines)

Showcase of this model is Case number 9

### References

*Separataband im Mathematischen Institut*, D 280.

Kummer, E.(1860). Monatsberichte Akademische Wissenschaft, Berlin, 30. Juli, p. 469-474.