A finicular form is the form taken by a cable or a rope for a given loading. Because a finicular form is made out of rope or cable legs, structures or elements, the finicular form is all intention. You can't push on a rope, you can only pull on a rope, so that's why a finicular form will be intention. If we take a finicular form and we flip it over, we get an anti-finicular form. As we flip it over, that tension that was in the finicular form changes to compression in an anti-finicular form. So the entire form of an anti-finicular form, whether it's an arch or a three-dimensional form, will be in compression. Because it's in compression, anti-finicular forms can't be made out of ropes anymore, because we can't push on them. Many of the ancient arches use stone, which is a great material for an anti-finicular form. We also use metals and concrete. One example of an anti-finicular form is an arch, and if you're interested in calculating the compressive forces in an arch, check out the next segment of the course. You can also use the arch simulator to calculate forces and arches with different configurations, or skip ahead and try building your own anti-finicular form.