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The different types of edge in a bidirected graph. In the mathematical domain of graph theory, a bidirected graph (introduced by Edmonds & Johnson 1970) [1] is a graph in which each edge is given an independent orientation (or direction, or arrow) at each end.
In some but not all cases, an implosion propels material outward, for example due to the force of inward falling material rebounding, or peripheral material being ejected as the inner parts collapse. If the object was previously solid, then implosion usually requires it to take on a more dense form—in effect to be more concentrated ...
A purchase returns journal (also known as returns outwards journal/purchase debits daybook) is a prime entry book or a daybook which is used to record purchase returns.In other words, it is the journal which is used to record the goods which are returned to the suppliers.
Everyday Mathematics curriculum was developed by the University of Chicago School Math Project (or UCSMP ) [1] which was founded in 1983. Work on it started in the summer of 1985. The 1st edition was released in 1998 and the 2nd in 2002. A third edition was released in 2007 and a fourth in 2014-2015. [2] A new one was released in 2020, dropping ...
The term Archimedean spiral is sometimes used to refer to the more general class of spirals of this type (see below), in contrast to Archimedes' spiral (the specific arithmetic spiral of Archimedes). It is the locus corresponding to the locations over time of a point moving away from a fixed point with a constant speed along a line that rotates ...
The outer coin makes two rotations rolling once around the inner coin. The path of a single point on the edge of the moving coin is a cardioid.. The coin rotation paradox is the counter-intuitive math problem that, when one coin is rolled around the rim of another coin of equal size, the moving coin completes not one but two full rotations after going all the way around the stationary coin ...
The golden spiral is a logarithmic spiral that grows outward by a factor of the golden ratio for every 90 degrees of rotation (pitch angle about 17.03239 degrees). It can be approximated by a "Fibonacci spiral", made of a sequence of quarter circles with radii proportional to Fibonacci numbers .
All public schools and many private schools in Bangladesh follow the curriculum of NCTB. Starting in 2010, every year free books are distributed to students between Grade-1 to Grade-10 to eliminate illiteracy. [6] These books comprise most of the curricula of the majority of Bangladeshi schools. There are two versions of the curriculum.