# Bicorne

### What is a bicorne?

Some forms of bicorne were designed to be folded flat so that they could be conveniently tucked under the arm when they were not being worn. A bicorne of such a style is also known as a chapeau-bras or chapeau-de-bras . The bicorne was widely worn until World War I as part of the full dress of officers of most of the worlds navies.

### What is the equation for a bicorn?

In geometry, the bicorn, also known as a cocked hat curve due to its resemblance to a bicorne, is a rational quartic curve defined by the equation y 2 ( a 2 − x 2 ) = ( x 2 + 2 a y − a 2 ) 2 . {/displaystyle y^ {2} (a^ {2}-x^ {2})= (x^ {2}+2ay-a^ {2})^ {2}.}

### What is the bicorn curve of degree 4?

The bicorn is a plane algebraic curve of degree four and genus zero. It has two cusp singularities in the real plane, and a double point in the complex projective plane at x=0, z=0 . If we move x=0 and z=0 to the origin substituting and perform an imaginary rotation on x bu substituting ix/z for x and 1/z for y in the bicorn curve, we obtain

### What is a flat bicorne?

Some forms of bicorne were designed to be folded flat so that they could be conveniently tucked under the arm when they were not being worn. A bicorne of such a style is also known as a chapeau-bras or chapeau-de-bras .

### What is the meaning of bicorn?

n.also bi·corne A hat with the brim turned up on two sides. adj. Bicornuate. [Latin bicornis, two-horned: bi-, bi-+ cornū, horn; see ker-in Indo-European roots.]

### What is a bicorne hat?

Unsourced material may be challenged and removed. The bicorne or bicorn (two-cornered) is a historical form of hat widely adopted in the 1790s as an item of uniform by Europe and American army and naval officers.

### What is the difference between a bicorne and tricorne?

Descended from the tricorne, the black-coloured bicorne originally had a rather broad brim, with the front and the rear halves turned up and pinned together forming a semi-circular fan shape; there was usually a cockade in the national colours at the front.

### Is bicorn a bicorn in Chamber of Secrets?

In the film adaptation of Harry Potter and the Chamber of Secrets, Bicorn is misspelled Bihorn in Moste Potente Potions. Bicorns were not covered in the fifty-second edition of Fantastic Beasts and Where to Find Them.

### What is the equation for a bicorn?

In geometry, the bicorn, also known as a cocked hat curve due to its resemblance to a bicorne, is a rational quartic curve defined by the equation y 2 ( a 2 − x 2 ) = ( x 2 + 2 a y − a 2 ) 2 . {/displaystyle y^ {2} (a^ {2}-x^ {2})= (x^ {2}+2ay-a^ {2})^ {2}.}

### What is the difference between a bicorne and tricorne?

Descended from the tricorne, the black-coloured bicorne originally had a rather broad brim, with the front and the rear halves turned up and pinned together forming a semi-circular fan shape; there was usually a cockade in the national colours at the front.

### What is a bicorne hat?

Unsourced material may be challenged and removed. The bicorne or bicorn (two-cornered) is a historical form of hat widely adopted in the 1790s as an item of uniform by Europe and American army and naval officers.

### What is a flat bicorne?

Some forms of bicorne were designed to be folded flat so that they could be conveniently tucked under the arm when they were not being worn. A bicorne of such a style is also known as a chapeau-bras or chapeau-de-bras .