Steganography

Steganographia

Steganographia is a book on steganography, written in c. 1499 by the German Benedictine about and polymath Johannes Trithemius. (Wikipedia).

Steganographia
Video thumbnail

What are Connected Graphs? | Graph Theory

What is a connected graph in graph theory? That is the subject of today's math lesson! A connected graph is a graph in which every pair of vertices is connected, which means there exists a path in the graph with those vertices as endpoints. We can think of it this way: if, by traveling acr

From playlist Graph Theory

Video thumbnail

Geogebra - Resizing an Image

quick review of how to resize an image in Geogebra

From playlist Geogebra

Video thumbnail

Hilbert Curve

This shows a 3d print of a mathematical sculpture I produced using shapeways.com. This model is available at http://shpws.me/2toQ.

From playlist 3D printing

Video thumbnail

Subgraphs

A subgraph consist of nodes and edges of a larger graph. In this tutorial I show you what a subgraph is and present an elegant representation in Mathematica. You can learn more about Mathematica on my Udemy course at https://www.udemy.com/mathematica/ PS! Wait until Udemy has a sale an

From playlist Introducing graph theory

Video thumbnail

What is a reduction dilation

👉 Learn about dilations. Dilation is the transformation of a shape by a scale factor to produce an image that is similar to the original shape but is different in size from the original shape. A dilation that creates a larger image is called an enlargement or a stretch while a dilation tha

From playlist Transformations

Video thumbnail

What are dilations

👉 Learn about dilations. Dilation is the transformation of a shape by a scale factor to produce an image that is similar to the original shape but is different in size from the original shape. A dilation that creates a larger image is called an enlargement or a stretch while a dilation tha

From playlist Transformations

Video thumbnail

Pythagorean theorem in Geogebra [PART 2] [Tutorial]

Pythagorean theorem in Geogebra [PART 2] [Tutorial] Pitagorina teorema u Geogebri [prvi dio] [Tutorial] In case you wanna to pay me a drink: https://www.paypal.me/admirsuljicic/

From playlist Geogebra [Tutoriali]

Video thumbnail

3D Printing Objects With Caustics | Two Minute Papers #38

What are caustics? A caustic is a beautiful phenomenon in nature where curved surfaces reflect or refract light, thereby concentrating it to a relatively small area. This technique makes it possible to essentially imagine any kind of caustic pattern, for instance, this brain pattern, and i

From playlist 3D Printing / 3D Fabrication

Video thumbnail

What is an enlargement dilation

👉 Learn about dilations. Dilation is the transformation of a shape by a scale factor to produce an image that is similar to the original shape but is different in size from the original shape. A dilation that creates a larger image is called an enlargement or a stretch while a dilation tha

From playlist Transformations

Related pages

Johannes Trithemius | History of cryptography | Steganography | Key (cryptography) | Cryptography