Conditional Properties

In each statement, if the test expression is true, then the conclusion expression is also assumed to be true. Conditional properties are used to prove theorems.

Symmetric Property of Equality

if a = b, then b = a


Transitive Property of Equality

if the following are true:

then a = c


Truth Propagation Property

if the following are true:

then b


Additive Property of Equality

if a = b, then a + c = b + c


Multiplicative Property of Equality

if a = b, then ac = bc


Zero Numerator Property

if not (a = 0), then 0 / a = 0


Multiplicative Inverse Property

if not (a = 0), then a / a = 1


Division is Multiplication by Inverse

if not (b = 0), then a / b = a ⋅ (1 / b)


Symmetric Inequality Property

if a > b, then b < a


Symmetric Inequality Property 2

if a < b, then b > a


Transitive Property of Inequality

if the following are true:

then a < c


Transitive Property of Inequality 2

if the following are true:

then c < b


Transitive Property with Less Than

if the following are true:

then a < c


Inequality Addition Property (1)

if a < b, then a + c < b + c


Inequality Addition Property (2)

if a < b, then a - c < b - c


Inequality Multiplication Property (1)

if the following are true:

then ac < bc


Inequality Multiplication Property (2)

if the following are true:

then a / c < b / c


Inequality Multiplication By Negative Value (1)

if the following are true:

then ac > bc


Inequality Multiplication By Negative Value (2)

if the following are true:

then a / c > b / c


Inequality Multiplicative Inverse Property

if the following are true:

then 1 / a > 1 / b


Greater Than Property

if the following are true:

then a > b


Greater Than is Not Equal

if a > 0, then not (a = 0)


Greater Than Property 2

if the following are true:

then ab > 0


Substitution

if a = b, then x + a = x + b


ADDI Instruction, Concise

if the following are true:

then value of cell dst at time (t + 1) = (value of cell src at time t) + imm


ADDI Instruction, Others

if the following are true:

then value of cell other at time (t + 1) = value of cell other at time t


SUBTRACTI Instruction

if the following are true:

then value of cell dst at time (t + 1) = (value of cell src at time t) - imm


SUBTRACTI Instruction, Others

if the following are true:

then value of cell other at time (t + 1) = value of cell other at time t


ADD Instruction

if the following are true:

then value of cell d at time (t + 1) = (value of cell s1 at time t) + (value of cell s2 at time t)


ADD Instruction, Others

if the following are true:

then value of cell other at time (t + 1) = value of cell other at time t


STORE Instruction

if the following are true:

then value of cell ((value of cell addr at time t) + imm) at time (t + 1) = value of cell src at time t


STORE Instruction, Others

if the following are true:

then value of cell other at time (t + 1) = value of cell other at time t


Load Instruction

if the following are true:

then value of cell dst at time (t + 1) = value of cell ((value of cell addr at time t) + imm) at time t


LOAD Instruction, Others

if the following are true:

then value of cell other at time (t + 1) = value of cell other at time t


BEQ on Memory

if the following are true:

then value of cell x at time (t + 1) = value of cell x at time t


BEQ on Equal

if the following are true:

then the PC at time (t + 1) = (i + 1) + imm


BEQ on Not Equal

if the following are true:

then the PC at time (t + 1) = i + 1


J Instruction

if the following are true:

then the PC at time (t + 1) = jump_to


J on Memory

if the following are true:

then value of cell x at time (t + 1) = value of cell x at time t


JR Instruction

if the following are true:

then the PC at time (t + 1) = value of cell addr at time t


JR on Memory

if the following are true:

then value of cell x at time (t + 1) = value of cell x at time t


JAL To

if the following are true:

then the PC at time (t + 1) = jump_to


JAL Instruction, Memory

if the following are true:

then value of cell x at time (t + 1) = value of cell x at time t


JAL Return

if the following are true:

then value of cell 2 at time (t + 1) = i + 1


Program Counter on ADDI

if the following are true:

then the PC at time (t + 1) = x + 1


Program Counter on ADD

if the following are true:

then the PC at time (t + 1) = x + 1


Program Counter on SUBTRACTI

if the following are true:

then the PC at time (t + 1) = x + 1


Program Counter on STORE

if the following are true:

then the PC at time (t + 1) = x + 1


Program Counter on LOAD

if the following are true:

then the PC at time (t + 1) = x + 1


Keyboard Interrupt

if interrupt at index: 0 time: t = 1, then the PC at time (t + 1) = 1


Some Device Interrupted Computer (1)

if interrupt at index: x time: t = 1, then interrupt at index: x time: (t + 1) = 0


Some Device Interrupted Computer (2)

if interrupt at index: x time: t = 1, then value of cell idx at time (t + 1) = value of cell idx at time t


Display Interrupt (1)

if the following are true:

then display text at x: (cursor x at time t), y: (cursor y at time t), and time: (t + 1) = value of cell (10 + (number of characters read at t)) at time t


Display Interrupt (2)

if the following are true:

then number of characters read at (t + 1) = (number of characters read at t) + 1


Display Finished (1)

if the following are true:

then value of cell 27 at time (t + 1) = 0


Display Finished (2)

if the following are true:

then number of characters read at (t + 1) = 0


Display Finished (3)

if the following are true:

then cursor x at time (t + 1) = cursor x at time t


Display Finished (4)

if the following are true:

then cursor y at time (t + 1) = cursor y at time t


Number of Characters Read Unchanged (1)

if value of cell 27 at time t = 0, then number of characters read at (t + 1) = number of characters read at t


Number of Characters Read Unchanged (2)

if value of cell 27 at time t = 0, then cursor x at time (t + 1) = cursor x at time t


Number of Characters Read Unchanged (3)

if value of cell 27 at time t = 0, then cursor y at time (t + 1) = cursor y at time t


Display Cursor X Move (1)

if the following are true:

then cursor x at time (t + 1) = (cursor x at time t) + 1


Display Cursor X Move (2)

if the following are true:

then cursor y at time (t + 1) = cursor y at time t


Display Cursor X New

if the following are true:

then cursor x at time (t + 1) = 0


Display Cursor Y New

if the following are true:

then cursor y at time (t + 1) = (cursor y at time t) + 1


Display Cursor Y Stay In Bottom

if cursor y at time t = 11, then cursor y at time (t + 1) = cursor y at time t


Display Text Move Up

if the following are true:

then display text at x: x, y: y, and time: (t + 1) = display text at x: x, y: (y + 1), and time: t


Cursor X on CR

if the following are true:

then cursor x at time (t + 1) = 0


Cursor Y on CR

if the following are true:

then cursor y at time (t + 1) = (cursor y at time t) + 1


CR move text up (1)

if the following are true:

then cursor y at time (t + 1) = cursor y at time t


CR move text up (2)

if the following are true:

then display text at x: x, y: y, and time: (t + 1) = display text at x: x, y: (y + 1), and time: t


Disk Interrupt

if interrupt at index: 1 time: t = 1, then the PC at time (t + 1) = 2


Write To Disk

if the following are true:

then disk byte at index: ((value of cell 47 at time t) + (disk bytes read at time t)) time: (t + 1) = value of cell (30 + (disk bytes read at time t)) at time t


Write To Disk Unchanged

if the following are true:

then disk byte at index: index time: (t + 1) = disk byte at index: index time: t


Increment Disk Bytes Read

if the following are true:

then disk bytes read at time (t + 1) = (disk bytes read at time t) + 1


Disk Write Finished (1)

if the following are true:

then value of cell 49 at time (t + 1) = 0


Disk Write Finished (2)

if the following are true:

then disk bytes read at time (t + 1) = 0


Disk Write Finished (3)

if the following are true:

then disk byte at index: index time: (t + 1) = disk byte at index: index time: t


Written To Disk Unchanged (1)

if value of cell 49 at time t = 0, then disk bytes read at time (t + 1) = disk bytes read at time t


Written To Disk Unchanged (2)

if value of cell 49 at time t = 0, then disk byte at index: index time: (t + 1) = disk byte at index: index time: t


Read from Disk

if the following are true:

then value of cell (30 + (disk bytes read at time t)) at time (t + 1) = disk byte at index: ((value of cell 47 at time t) + (disk bytes read at time t)) time: t


Disk Read Finished

if the following are true:

then interrupt at index: 1 time: (t + 1) = 1


Disk Read Unchanged

if the following are true:

then disk byte at index: index time: (t + 1) = disk byte at index: index time: t


Begin PyList (1)

if the following are true:

then Expression Stack at time (t + 1) = [ [ Python list elements, [ ] ], [ ] ]


Begin PyList (2)

if the following are true:

then the line at time (t + 1) = i


Begin PyList (3)

if the following are true:

then the tab at time (t + 1) = j


Begin PyList (4)

if the following are true:

then Value Stack at time (t + 1) = [ [ ], [ ] ]


Begin PyList (5)

if the following are true:

then Python Object Store at time (t + 1) = Python Object Store at time t


Begin PyList (6)

if the following are true:

then Control Map at time (t + 1) = Control Map at time t


Begin PyList (7)

if the following are true:

then Variables Map at time (t + 1) = Variables Map at time t


Begin PyList (8)

if the following are true:

then Context Stack at time (t + 1) = Context Stack at time t


Begin PyList Elements (1)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Expression Stack at time (t + 1) = [ elements, [ [ Python list elements, ys ], rest ] ]


Begin PyList Elements (2)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ]


Begin PyList Elements (3)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Parameters List at time (t + 1) = None


Begin PyList Elements (4)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then the line at time (t + 1) = the line at time t


Begin PyList Elements (5)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then the tab at time (t + 1) = the tab at time t


Begin PyList Elements (6)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Variables Map at time (t + 1) = Variables Map at time t


Begin PyList Elements (7)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Control Map at time (t + 1) = Control Map at time t


Begin PyList Elements (8)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Python Object Store at time (t + 1) = Python Object Store at time t


Begin PyList Elements (9)

if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Context Stack at time (t + 1) = Context Stack at time t


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