Convex lenses have positive dioptric value and are generally used to correct hyperopia ( farsightedness ) or to allow people with presbyopia ( the limited accommodation of advancing age ) to read at close range.

Convex lenses have a positive dioptric value, which causes the light to focus closer than its normal range.

Convex lenses, of help only to the far-sighted.

According to most former employees, Convex was a very fun place at which to work.

Some famous names in Computing worked at Convex.

* Co-founder Steve Wallach is well known for his work at Data General, Convex, Convey Computer Corporation and other companies.

* Tom Christiansen of Perl fame worked at Convex in the Technical Assistance Center and then on a project called Convex Meta Series, which was an attempt to create cheap cluster computers.

* Dan Connolly of HTML and W3C fame worked at Convex on the documentation tools team.

* Mark Lutz author of several Python programming language books worked at Convex.

* Frank Marshall who led Cisco Systems to great success in the 1990s was VP of engineering at Convex during its peak years.

* Robert Morris of Morris worm fame worked as a summer intern at Convex.

Convex cloissoné is produced by overfilling each cloison, at the last firing.

* Torus — Convex, semi-circular molding, larger than an astragal, often at the base of a column, which may be enriched with leaves or plaiting

Convex surfaces have a higher chemical potential than concave surfaces therefore grain boundaries will move toward their center of curvature.

; Convex mirrors

Among the most respected of the postwar American poets are John Ashbery, the key figure of the surrealistic New York School of poetry, and his celebrated Self-portrait in a Convex Mirror ( Pulitzer Prize for Poetry, 1976 ); Elizabeth Bishop and her North & South ( Pulitzer Prize for Poetry, 1956 ) and " Geography III " ( National Book Award, 1970 ); Richard Wilbur and his Things of This World, winner of both the Pulitzer Prize and the National Book Award for Poetry in 1957 ; John Berryman and his The Dream Songs, ( Pulitzer Prize for Poetry, 1964, National Book Award, 1968 ); A. R.

* Convex Computer ( founded 1982 as Parsec ; acquired by Hewlett-Packard in 1995 )

* M. C. Escher-lithographs: Compass Rose ( Order and Chaos II ); Convex and Concave ; Three Worlds

* Convex cone, a subset C of a vector space V is a convex cone if αx + βy belongs to C, for any positive scalars α, β, and any x, y in C

# Convex if for each x and y in C, tx +( 1 – t ) y is in C for all t in the unit interval, that is whenever 0 ≤ t ≤ 1.

The earliest known citation on the Internet is from 1986 on Usenet in the signature of a poster from Convex Computer Corporation as "' I think there is a world market for about five computers ' — Remark attributed to Thomas J. Watson ( Chairman of the Board of International Business Machines ), 1943 ".

Convex quadratic programming is a special case of the more general field of convex optimization.

There is a mailing list of Convex ex-employees, as well as frequent reunions.

Convex plasmolysis is always irreversible while concave plasmolysis is usually reversible.

* Convex polygon, a polygon which is not concave

The Computer History Museum has examples of the FX / 8 and FX / 1 ( from Convex Computer Corporation after Alliant's fall ), but is seeking examples of FX / 80 and FX / 2800 configurations.

In that scene Convex tells Max about the " Image Accumulator ," ( which is the device placed on Max's head during his meeting with Convex ) an experimental new form of night vision that can work in zero-light conditions.

# Convex grind — Rather than tapering with straight lines to the edge, the taper is curved, though in the opposite manner to a hollow grind.

Convex and Concave is a lithograph print by the Dutch artist M. C. Escher, first printed in March 1955.

* FDTD Animation of Electromagnetic Propagation through Convex Lens ( on-and off-axis ) on YouTube

: Convex mirrors provide a wider field of view than flat mirrors, and are often used on vehicles, especially large trucks, to minimize blind spots.

Variants of OSF / 1 AD were used on several such systems, including the Intel Paragon XP / S and ASCI Red, Convex Exemplar SPP-1200 ( as SPP-UX ) and the Hitachi SR2201 ( as HI-UX MPP ).

In order to lower costs, the Convex designs were not as technologically aggressive as Cray's, and were based on more mainstream chip technology, attempting to make up for the loss in performance in other ways.

For some time, there were beer parties every Friday, and an annual Convex Beach Party ( where a truck load of sand would be dumped on the parking lot to simulate a beach in Richardson, Texas ).

Convex lasted longer than most minisupercomputer companies, and to celebrate this and more so to remind themselves of the difficulties of the market, Convex had a graveyard of former competitor companies on its property.

Convex function on an interval.

The compiler was based on the Convex Fortran ( and C ) compiler.

The head of Spectacular Optical, Barry Convex ( Leslie Carlson ), has been secretly working with Harlan to get Max exposed to Videodrome and to have him broadcast it, as part of a crypto-government conspiracy to morally and ideologically " purge " North America, giving fatal brain tumours to " lowlifes " fixated on extreme sex and violence.

* William Goldman Convex real projective structures on compact surfaces, Journal of Differential Geometry 31 ( 1990 ), 791 -- 845.

Convex function on an interval

Grünbaum's classic monograph Convex polytopes, first published in 1967, has become the main textbook on the subject.