[8] **viXra:1806.0460 [pdf]**
*submitted on 2018-06-29 08:19:41*

**Authors:** Timothy W. Jones

**Comments:** 9 Pages.

We develop calculus from an experimental perspective. Using results from geometry and algebra, we generalize to other functions as a speculative act. Eventually formulas are created. This sequence reverses the usual hard things first approach of contemporary calculus text books.

**Category:** General Mathematics

[7] **viXra:1806.0431 [pdf]**
*submitted on 2018-06-29 03:16:29*

**Authors:** Thinh Nguyen

**Comments:** 0 Pages.

The Marquis du Condorcet recognized 200 years ago that majority rule can produce intransitive group preferences if the domain of possible (transitive) individual preference orders is unrestricted. We present results on the cardinality and structure of those maximal sets of permutations for which majority rule produces transitive results (consistent sets). Consistent sets that contain a maximal chain in the Weak Bruhat Order inherit from it an upper semimodular sublattice structure. They are intrinsically related to a special class of hamiltonian graphs called persistent graphs. These graphs in turn have a clean geometric interpretation: they are precisely visibility graphs of staircase polygons. We highlight the main tools used to prove these connections and indicate possible social choice and computational research directions.

**Category:** General Mathematics

[6] **viXra:1806.0339 [pdf]**
*submitted on 2018-06-22 06:21:33*

**Authors:** Thinh Nguyen

**Comments:** 3 Pages.

We survey some information about the clique problem - one of the cornerstone of the ﬁeld of research in theory of algorithms. A short note at the end of the paper should be read with care on the reader’s own.

**Category:** General Mathematics

[5] **viXra:1806.0222 [pdf]**
*submitted on 2018-06-19 08:52:17*

**Authors:** Edgar Valdebenito

**Comments:** 8 Pages.

This note presents some numerical series

**Category:** General Mathematics

[4] **viXra:1806.0220 [pdf]**
*submitted on 2018-06-19 08:54:52*

**Authors:** Edgar Valdebenito

**Comments:** 1 Page.

In this note we recall an identity given by Ramanujan.

**Category:** General Mathematics

[3] **viXra:1806.0214 [pdf]**
*submitted on 2018-06-19 12:56:04*

**Authors:** Fenasi Kerim

**Comments:** 2 Pages.

In this paper I am proposing that we should find the general solution for every conceivable problem and how we can achieve such a triumph in mathematics.

**Category:** General Mathematics

[2] **viXra:1806.0121 [pdf]**
*submitted on 2018-06-09 09:03:57*

**Authors:** 김만욱

**Comments:** 1 Page. english is too hard

I showed Collatz conjecture is false if 0 is natural number

**Category:** General Mathematics

[1] **viXra:1806.0063 [pdf]**
*submitted on 2018-06-05 08:39:08*

**Authors:** Edgar Valdebenito

**Comments:** 1 Page.

This note presents a trivial formula for pi: pi=3.14159265...

**Category:** General Mathematics