At the Student Recreation Center today I spotted this rope hanging down. I don't know if this is a bona fide knot or just someone having fun to "store" the rope in plain sight.

Whether this is a knot to a mathematician, I do not know.

From http://mathworld.wolfram.com/Knot.html » “In mathematics, a knot is defined as a closed, non-self-intersecting curve that is embedded in three dimensions and cannot be untangled to produce a simple loop (i.e., the unknot). While in common usage, knots can be tied in string and rope such that one or more strands are left open on either side of the knot, the mathematical theory of knots terms an object of this type a "braid" rather than a knot. To a mathematician, an object is a knot only if its free ends are attached in some way so that the resulting structure consists of a single looped strand. … The study of knots and their properties is known as knot theory. Knot theory was given its first impetus when Lord Kelvin proposed a theory that atoms were vortex loops, with different chemical elements consisting of different knotted configurations (Thompson 1867). P. G. Tait then cataloged possible knots by trial and error. Much progress has been made in the intervening years.”

1 year ago (“Reference image (i.e., ‘Before’)”): http://365project.org/rhoing/365/2016-05-20

2 years ago (“Clematis (I think)”): http://365project.org/rhoing/365/2015-05-20

3 years ago (“Six-spotted Tiger Beetle”): http://365project.org/rhoing/365/2014-05-20

4 years ago (“Natural dissection”): http://365project.org/rhoing/365/2013-05-20

5 years ago (“Amtrak Superliner: Texas Eagle #21”): http://365project.org/rhoing/365/2012-05-20

6 years ago (“‘Comcast Building,’ in Philadelphia”): http://365project.org/rhoing/365/2011-05-20

[ IMG_20170520_155150995_BURST000_COVER_TOPS6x12Sctm :: phone ]

Whether this is a knot to a mathematician, I do not know.

From http://mathworld.wolfram.com/Knot.html » “In mathematics, a knot is defined as a closed, non-self-intersecting curve that is embedded in three dimensions and cannot be untangled to produce a simple loop (i.e., the unknot). While in common usage, knots can be tied in string and rope such that one or more strands are left open on either side of the knot, the mathematical theory of knots terms an object of this type a "braid" rather than a knot. To a mathematician, an object is a knot only if its free ends are attached in some way so that the resulting structure consists of a single looped strand. … The study of knots and their properties is known as knot theory. Knot theory was given its first impetus when Lord Kelvin proposed a theory that atoms were vortex loops, with different chemical elements consisting of different knotted configurations (Thompson 1867). P. G. Tait then cataloged possible knots by trial and error. Much progress has been made in the intervening years.”

1 year ago (“Reference image (i.e., ‘Before’)”): http://365project.org/rhoing/365/2016-05-20

2 years ago (“Clematis (I think)”): http://365project.org/rhoing/365/2015-05-20

3 years ago (“Six-spotted Tiger Beetle”): http://365project.org/rhoing/365/2014-05-20

4 years ago (“Natural dissection”): http://365project.org/rhoing/365/2013-05-20

5 years ago (“Amtrak Superliner: Texas Eagle #21”): http://365project.org/rhoing/365/2012-05-20

6 years ago (“‘Comcast Building,’ in Philadelphia”): http://365project.org/rhoing/365/2011-05-20

[ IMG_20170520_155150995_BURST000_COVER_TOPS6x12Sctm :: phone ]

Maggiemae
ace

There are so many types of knots and I am fascinated by them all but never remember - except for the ones used in sailing!

June 29th, 2017

Rick Schies
ace

An interesting capture and a very neatly tied rope.

June 30th, 2017

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