Download more free E-Books! (Part 2)
Unique editions! Download without any restriction. Fully printable, all of them in PDF format.
The Sand Reckoner by Archimedes
Do you think that the number of grains of sand is infinite? Many people think that the grains of sand are uncountable, that they are infinite, but how do you prove or show them that the amount of grains is not infinite? Well, a long time ago, Archimedes, the great Greek mathematician invented a method to count the number of grains not only of the beaches of his sunny Greece, but how many are needed to fill a sphere the size of the known universe at his time ---up to Saturn!
It took for him a small amount of pages to develop his method and calculate the grains of sand needed to fill the universe. He used simple logic and simple arithmetic to arrive an upper bound for the top quantity needed grains.
Now this opus is available though Datum books for free. Download it now; for a limited time is free!
Do you think that the amount of grains of sand if not infinite is a really big number, at least the biggest number of the all? The you have to read the article: The Eddington’s number: A case of scientific arrogance? for the amount of protons in the Universe! You will be amazed at this exact count of proton particles in the Universe!
44 Selected Puzzles from Amusements in Mathematics by Henry E. Dudeney
This EBook is a wonderful selection of the many puzzles the Dudeney created and also collected. Amusements in Mathematics is a classic in the mathematical literature. 44 Selected Puzzles is a hand picked selection of those puzzles that are appealing for their graphic content.
44 Selected Puzzles from Amusements in Mathematics is a nicely formatted EBook suitable for printing ---like all the EBooks offered for free in this website.
The last section of this EBook is dedicated to the solutions of all of them, exactly as Dudeney solved them.
Click here to learn more, and to download this EBook.
Another World or The Fourth Dimension
Download this free E-Book written by A. T. Schofield, M.D. about the fourth dimension. What makes this book different is that the author's objective is to prove that the fourth dimension is present in some Bible chapters and that the fact that some prophets were taken alive to the heavens is another proof of beings moving from our three dimensional space to a fourth dimension. "We have also the account of Elijah and Enoch and Christ suddenly leaving this world for the higher one, while yet alive."
It can be said that Another World is the sequel to Flatland, but instead of people traveling from a flat space to our 3D space, is our 3D people going to a 4D universe. A controversial book that you would surely enjoy!
Click here to learn more, and to download this EBook
While you are here ...
Take a look at the book of the foundations of Transcomplex Numbers. This is a book that goes step by step starting with the foundations of the real numbers system, stepping to the imaginary numbers, building the complex number system and finally making the extension to four dimensions.
I you liked The Golden E-Book of Graphs of Mathematical Functions, you are also going to love Foundations of Transcomplex Numbers.
Foundations of Transcomplex Numbers is a book about the complex numbers field and how it can be extended to four dimensions. Yes, the complex numbers field is a planar field in the sense that it is made of real and imaginary numbers only (two dimensions), but this field can be extended to four dimensions and retain all the properties that we are accustomed to see with the complex variables.
Click on the cover page image to see many sample pages of the book.
Did you like ...
the colorful graphs seen in The Golden E-Book of Graphs of Mathematical Functions? Do you want to make your own graphs or plots like the ones you see in this E-Book?
You can. 4DLab - the software for easy equation and plotting was made specially to draw equation plots like no other software. With 4DLab is very easy to make graphs of mathematical surfaces because 4DLab was constructed to make spatial graphs, and to make planar Cartesian graphs, and to plot 2-dimensional surfaces as seen from the 3D-space.
Take another look at:
- the Home page where you will see more samples of beautiful mathematical surfaces, or go to
- the Transcomplex Quadratic Function page, or go to
- the Transcomplex Trigonometric Sin Function page
and see other trigonometric graphs not included in the The Golden E-Book.
