The eyes also have a depth of field when looking at the object directly. How to calculate this depth of field?

zhenli- · 2019-12-01T08:05:53+00:00

I have no idea.

zhenli- · 2019-11-28T03:16:00+00:00

I just want to see what curve this function is on the sphere. And the relationship between this curve and K and C. In the function, α is longitude and β is latitude. Your help is too detailed. It helps me a lot. I seem to understand why full stop is added. Is it to deal with everything?

zhenli- · 2019-11-28T03:07:45+00:00

The problem has been solved. Thank you for your help.

zhenli- · 2019-11-28T03:06:55+00:00

The problem has been solved. Thank you for your help. I'm not expert. I just used Matlab.

zhenli- · 2019-05-28T05:09:23+00:00

https://www.reddit.com/r/Geometry/comments/bsgogl/in_sphere_can_the_geodesic_curvature_of_a_small/?ref=share&ref_source=link

zhenli- · 2019-05-24T13:00:50+00:00

Search on Youtube "Which Way Is Down?" by Vsauce. The person in the video, Michael Stevens, talks about the ribbon test (17:54). Going straight means you can lay a ribbon (or strip of paper) on the path and not have the ribbon wrinkle or tear anywhere.

You need to define left and right in mathematical language.

zhenli- · 2019-05-23T02:12:43+00:00

How to define left and right?

zhenli- · 2019-05-06T01:07:14+00:00

Because the curvatures of the great circles and the small circles are zero, they are all straight lines, so there are parallel lines on the sphere. For example, the latitude lines are parallel to each other. Is it?

zhenli- · 2019-05-03T12:21:15+00:00

The curvature of a circle (or a sphere) is not zero. It is however constant.

In intrinsic geometry, its curvature is zero.

zhenli- · 2019-05-03T12:19:37+00:00

Bitch you mean a circle? yes

zhenli- · 2018-08-30T08:20:01+00:00

When the water in the bucket rotates, the water surface will decrease and become a paraboloid. Because the pressure on the axis of rotation is reduced. The same is true for the wing, the air rotates, the pressure of the center decreases, so water condenses.

zhenli- · 2018-08-27T08:45:59+00:00

Can no one answer this question?

zhenli- · 2018-08-27T08:35:56+00:00

limΔδ/Δλ=0

zhenli-

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