P-026 Inversion Logique (Logical Inversion)

Basic Information

Title: P-026 Inversion Logique (Logical Inversion)
Artist(s): Manfred Mohr
Date Created: 1970
Unframed Dimensions: 9 x 9 in.
Inventory ID: Mohr-1970-05


signed and dated lower right in graphite
“Tape 1, 107” written in graphite lower left
titled lower left on the reverse of the paper in graphite

hardware: CDC7600
software: Program 21 with FORTRAN
output machine: Benson Plotter

The elements are horizontal, vertical, 45 degree lines, square waves, zig-zags, and have probabilities for line widths and lengths. The algorithm places elements in a horizontal direction and has a high probability to move from left to right and a limited probability to backtrack. The original idea of this algorithm was to create a visual musical score which defies the progression in time by occasionally turning back on itself. Thus at the same time an abstract text is created.


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signed and dated lower right in graphite titled lower left in graphite artist’s name, title, date, measurements, and medium printed on artist’s label attached to the back of the frame


signed and dated in graphite lower right “Works from Mohr’s Line Cluster phase (1989-1990) are based on the 5-dimensional hyper-cube, a structure built from a set of eighty lines. A subset of twenty lines, containing four lines from each “dimensional-direction” are chosen from this structure. Each “dimensional-direction” consists therefore of four parallel lines, represented by […]


signed, titled, and dated on the reverse in graphite image conceived: 1970 drawing on canvas: 1990 “Mohr’s work is an important bridge between handmade manipulations and machine-calculated structures in art. Following a series of geometric experiments, a shift toward hard-edge painting by 1967 immediately preceded Mohr’s use of the computer as a tool for art. […]


“The P-2400 series is based on the 1978 algorithm from the work phase Dimensions I. The first version of this alogrithm did not include the possibility of rotating the four-dimensional hypercube. In 2017, Mohr pursued this original code and directed the algorithm into a different visual solution. Again, the basic 32 lines which constitute the […]