A. THE MEANING OF DIRECTION & SIGNAGE:
We humans see ourselves in terms of position: vertical upright, horizontal on back, & horizontal on side. These being our most common positions relative to Earth, they become the 3 basic dimensions that are seen as 3 linear axes orthogonal (at right angles) to each other. Furthermore, we think of measurable increments along each axis as being in the positive or negative direction depending upon their position relative to a zero point on the axis. Such a concept gives us a 3-dimensional reference system that we see as absolute, albeit not necessarily so. In mathematics unfortunately the plus and minus signs have two different meanings, depending upon the position relative to an operand. When touching an operand, it means the value of the operand is in the positive or negative direction along a linear axis. But it can also mean to add or subtract the operand in the absence of an explicit operator between two numbers. And in the absence of a touching sign, the default is in the positive direction. When not touching an operand, it means addition or subtraction between two operands, ie, it becomes an operator. So in an expression, there can be both directional signs and operational signs. As a side note & not relevant to this discussion, a minus sign in front of an exponent means to raise the reciprocal of the base to the power indicated by the exponent.B. IMAGINARY NUMBERS:
The imaginary number, i, is said to be the square root of -1 which is impossible, because according to current convention, there is no number multiplied by itself one time that yields a negative number. Lacking the ability to determine a numeric value, the square root of -1 is assigned the variable, “i” & complex numbers are mathematical expressions containing “i”. A complex number is of the form (+or-)a + (+or-)b * i, where “a” is the numerical offset, “b” is the numerical multiplicand, & “i” is the Multiplier. It is rare to see i * b, where “i”, as the Multiplier, precedes “b”, as the multiplicand. But that is going to change in this writing, as we shall soon see.C. THE RULES OF MULTIPLICATION:
The aforementioned indeterminate problem of not being able to evaluate “i” arises from the fact that mathematicians established long ago that A MINUS NUMBER TIMES A MINUS NUMBER SHOULD BE POSITIVE. Furthermore, they established that THE PRODUCT OF TWO OPPOSITELY SIGNED VALUES SHOULD BE NEGATIVE. These conclusions arose due to the distributive law of mathematics. Let me state here my belief that when it comes to groupings via ( ..), the order of operations should dictate that expressions within a group should be evaluated first. But I will not quibble over the distributive law.D. CURRENT MULTIPLY OPERATIONS IN USE:
These current-day conventions affecting a change in value resulting from multiplication can be expressed as follows: Let: M = multiplier/operator m = multiplicand/operand “*” means times, (not to be confused with “**” which means exponent of) R = resulting product 1. THE PRODUCTS OF ACCUMULATIVE MULTIPLICATION: Accumulation Of Positives: Plus times Plus = Plus +M * +m = +R Interpretation: Add +m to the current value M times. OR GRAPHICALLY, Relative to the current point, go right M times in increments of |m|. Example: +3 * +2 = +2 + 2 + 2 = 6 Accumulation Of Negatives: Plus times Minus = Minus +M * -m = -R Interpretation: Add -m to current value M times. OR GRAPHICALLY, Relative to the current point, go left M times in increments of |m|. Example: +3 * -2 = 0 + ( – 2 – 2 – 2) = 0 + – ( 2 + 2 + 2) = -6 2. THE PRODUCTS OF DECUMULATIVE MULTIPLICATION: Decumulation Of Positives: Minus times Plus = Minus -M * +m = -R Interpretation: Subtract +m from the current value M times.. OR GRAPHICALLY, Relative to the current point, go left M times in increments of |m|. Example: -3 * +2 = 0 + -( 2 + 2 + 2) = – 6 Decumulation Of Negatives: Minus times Minus = Plus -M * -m = +R Interpretation: Subtract -m from current value M times. OR GRAPHICALLY, Relative to the current point, go right M times in increments of |m|. Example: -3 * -2 = – ( -2) – (-2) – (-2 ) = + 2 + 2 +2 = +6 Observe that I have identified two different types of multiplication, “accumulative” and “decumulative”. I make this distinction because accumulative multiplication requires repetitive addition, where decumulative multiplication requires repetitive subtraction. Also, we note that the sign of the product resulting from the repetitive multiplication of a negative multiplicand alternates between + on even repetitions & – on odd repetitions. In other words, a successive number of subtractions of a negative number from itself ALTERNATES BETWEEN + & -. This alternation does not appear anywhere else. So this behavior is seen as unusual.E. RECONSTRUCTING THE PICTURE OF MULTIPLICATION:
By insisting that the Multiplier always occurs in front of the multiplicand, we can clearly see that, among other things, a negative Multiplier means decumulation, whereas a positive Multiplier means accumulation. Aside from this fact, we might speculate that there could be other meanings in addition. What those could be, we are about to find out. Moving on, we might assert that the Multiplier,M, reside on an M-axis different from the multiplicand,m, on a separate m-axis, with the two axes intersecting each other orthogonally at right angles. So the visual graphic of the Multiplier in relation to the multiplicand becomes a 2-dimensional planar picture with each axis having its own set of + & – directions, rather than just a simple 1-dimensional linear graphic. THIS NOT JUST THIS m-axis | + – ——0——- + M-axis – ———0———+ M & m | – (We are not just talking candy here) Given this distinction, we can now begin to think in terms of: VECTOR CROSS-MULTIPLICATION, (aka, CROSS-MULTIPLICATION or CROSS-COMPUTATION or X-MULTIPLICATION) , versus VECTOR DOT-MULTIPLICATION, (aka, DOT-MULTIPLICATION or DOT-COMPUTATION or *-MULTIPLICATION or SCALAR-MULTIPLICATION) . The difference is as follows. Vector dot multiplication results in a simple 1-dimensional product (called the dot-product) that resides on the same axis as the Multiplier & multiplicand. Up to now, current conventional multiplication has always been equivalent to vector dot multiplication for both accumulative and decumulative multiplication. But that is about to change, as we are about to change decumulative multiplication from vector dot to vector cross multiplication. The mathematical expression for computing the vector cross product is given as: R = M * m Vector cross multiplication results in a product (called the cross-product) that is uniquely identified with a direction which is orthogonal to directions identified by the M-axis & the m-axis., & whose numerical value is the simple product of the two numerical values further multiplied by the sine of the smallest angle, @, between the two vectors, M and m. The mathematical expression for computing the vector cross product is given as: R = M X m = M * m* sine(@) . So we now have two methods of multiplication, with cross-multiplication giving us a clearer 3-dimensional/directional picture shown as follows. + m-axis + R-axis = CROSS PRODUCT AXIS ^ /\ | ‘ | ‘ | R1 = (M1 X m1) * sine(90) / m1 ‘ | ‘ -M————–0———— M1 ——–> + M-axis ‘ | @ = -90 ‘ | ‘ | ‘ | -R -m We now proceed to examine the deeper meanings of the cross-multiplication method.F. ABOUT THE ANGLE, @, BETWEEN M & m.
We’ve started out saying that M-axis was orthogonal to m-axis for the sake of simplicity. But the cross-product approach says that such is not always the case when it comes to vectors, because @ can take on any value between +90 degrees and -90 degrees as the shortest path between the sides of the angle. And this has consequences for both the numerical value of the resultant, R, its dimension & its positive versus negative directions. Before we go any further, we need to have a clear understanding of how we view angles from a fixed observation point. Then we need to know what the sine of an angle is. And finally, we can discuss what role the of the angle between the Multiplier & multiplicand might be. 1. ABOUT PLUS & MINUS ANGLES: Envision the face of your clock where the M-axis is a straight line running from 12 to 6 in a negative direction & the m-axis is a straight line running from 9 to 3 in a positive direction. Progressing clockwise, we consider 12 o’clock to be +0 degrees, & relative to it we recon 3 o’clock to be +90 degrees, 6 o’clock to be +180 degrees, & 9 o’clock to be +270 degrees. But progressing counter-clockwise from 12 o’clock, we consider +270 degrees to be -90 degrees & +180 degrees to be -0 degrees. So in this scenario, 12 o’clock is the reference side of any angle from it. And because we have aligned the M-axis with 12 o’clock, the M-axis is also the reference side of any angle at which the m-axis intersects it. Furthermore, should the M-axis be in a direction other than 12 o’clock, then the M-axis should remain the reference side of the angle, @. Therefore, the plus or minus direction of the angle,@, between the M-axis and the m-axis depends upon whether or not we go clockwise or counterclockwise from the M-axis to the m-axis. And the shortest path from M to m will dictate whether we proceed clockwise or counterclockwise from M. 2. ABOUT THE SINE OF AN ANGLE: Now what about the sine of @? Without going into too much detail about what is meant by the sine of an angle, it is enough to say that the sine( +0 degrees) is +0, the sine(+90 degrees) is +1, the sine(-0 degrees) is -0, & the sine(-90 degrees) is -1. So the sine of an angle acquires the same sign as the sign of the angle. If the angle is negative, its sine is negative. If the angle is positive, its sine is positive. 3. WHICH WAY JOSE, PLUS OR MINUS?: We now have to determine in what direction the product points, plus or minus, along the resulting orthogonal axis. Traditional vector math calls for the application of the RIGHT HAND THUMB RULE. Finding this to be a little too nebulous to explain, I will only mention that the index finger should be the multiplicand. I leave it there. As an option, I would suggest discounting the sign of the Multiplier and applying the sign arising from the sine(@) to the sign of the multiplicand to determine the sign of the resultant.G. REDEFINING ACCUMULATIVE VS DECUMULATIVE CROSS-MULTIPLICATION:
Having identified two different, but similar forms of multiplication, we now ask,”Are we using the correct form of multiplication for each?”. After all, we see some unexplainable differences between decumulative & accumulative operations. So let’s try applying vector cross-computation to multiplication instead of dot-computation. We can now see that cross-multiplication not only results in a product pointing in an orthogonal direction away from the directions of the Multiplier & multiplicand, but can yield an absolute value entirely different from today’s conventional multiplication, especially if the sine(@) is other than +1 or -1. Therefore, we ask “Which value(s) +1 or -1 would yield the same results as todays multiplication”. The answer(s) are clear. For accumulative multiplication, we need a sine() = +1, ie, = +90.
For decumulative multiplication we need sine() = -1,
ie. = -90. With this understanding, we now modify the
current conventions by simply replacing the * operator with
the X operator and adding the (sine ), making = +90
for accumulative & @ = -90 for decunulative
multiplication.
Let:
M = multiplier/operator
m = multiplicand/operand
“*” means times,
(not to be confused with “**” which means exponent of)
“X” means vector cross multiplication,
(not to be confused with variable “x” )
“@” is the smallest angle between the M-axis & m-axis.
It is plus (+) if the shortest distance
from the M-axis to the m-axis is clockwise.
It is minus (-) if counterclockwise.
R = resulting product
1. ACCUMULATIVE CROSS-MULTIPLICATION:
For accumulative multiplication, +90 degrees is appropriate.
In order for the resultant product, R, to become the same
value as determined by vector dot multiplication, the value
of sine() must equal +1, which means the angle, , between
the +M-axis and +m-axis must be +90 degrees.
@ = +90, sine(+90) = +1
Accumulation Of Positives:
Plus times Plus = Plus
R = +M X (+m)
= |+M| * (+m) * sine(@)
= |+M| * (+m) * sine (+90)
= |+M| * (+m) * (+1)
= |+M| * (+m)
= + (M * m)
Accumulation Of Negatives:
Plus times Minus = Minus
R = +M X (-m)
= |+M| * (-m) * sine(@)
= |+M| * (-m) * sine (+90)
= |+M| * (-m) * (+1)
= |+M| * (-m)
= – (M * m)
2. DECUMULATIVE CROSS-MULTIPLICATION:
For decumulative multiplication, -90 degrees works.
In order for the resultant product, R, to become the same
value as determined by vector dot multiplication, the value
of sine() must equal -1, which means the angle, , between
the +M-axis and +m-axis must be -90.
@ = -90, sine(-90) = -1
Decumulation Of Positives:
Minus times Plus = Minus
R = -M X (+m)
= |-M| * (+m) * sine(@)
= |-M| * (+m) * sine (-90)
= |-M| * (+m) * (-1)
= |-M| * (-m)
= – (M * m)
Decumulation Of Negatives:
Minus times Minlus = Plus
R = -M X (-m)
= |-M| * (-m) * sine(@)
= |-M| * (-m) * sine (-90)
= |-M| * (-m) * (-1)
= |-M| * (+m)
= + (M * m)
Note that I did not recognize or apply the sign of the Multiplier. It
was unnecessary when the sine() was included. Of course, I
could have made = +90 for the decumulative operation. But
then there still needed to be some explanation for the differences
from accumulative cross-multiplication.
H. THE MYSTERY OF THE FLIP-FLOPPING RESULTANT:
1. ABOUT SUCCESSIVE MULTIPLICATIONS.: The fact that the resultant product of M1 X m1, R1, always resides in the direction orthogonal to the plane of the M-axis/ m-axis, only one possible direction is left in which R may reside, that direction being identified as the R-axis. And if that resultant product, R1, now becomes the multiplicand, m2, of a 2nd such computation involving a new M2, then the direction of the new resultant product, R2, must be on the same axis as the previous multiplicand, m1. And if that product, R2, becomes the next multiplicand m3, on a 3rd such computation, then the direction of the new resultant product, R3, must be in the same direction as R1. In other words, given a succession of repetitive vector cross-multiplications & where the resulting product becomes the next multiplicand, the R-axis switches positions with the m-axis & reverses its negative & positive directions. 2. REPETITIVE DECUMULATIVE CROSS-MULTIPLICATION OF NEGATIVE REAL NUMBERS: The placement of the product appears as a positive on the R-axis & as a negative on the m-axis in alternating order due to the right-hand thumb rule flip-flopping with each iteration of computing the cross-product. This explains why a repetitious negative times a negative equals a positive R1 on the R-axis, followed by a negative R2 on the m-axis, followed by a positive R3 back on the R-axis. It gives the appearance of a pulsating R-axis acting as a binary switch between + & -. 3. RAISING IMAGINARY -i TO THE Pth POWER. If we conduct a succession of decumulative-cross multiplications of -i , assuming @ = 90 degrees, we get: (Cycle begins) (-i)**2 = -i X -i = +i**2 = -1 ( R1 to the R-axis) ______________| V (-i)**3 = -i X -1 = -1 X -i = +i (R2 to the m-axis) ______________| V (-i)**4 = -i X +i = +1 (R3 to the R-axis?) ______________| V (-i)**5 = -i X +1 = -i ( R4 to the m-axis?) | (Cycle starts over) | _______________| V (-i)**6 = -i X -i = -1 (R5 to the R-axis?) Powers of (-i) confirmed by internet. Of great interest here is the observation that the successive multiplications oscillate between real rational numbers and imaginary irrational + & – i. We must ask, ” is i the basic unit of measure in the world of irrational numbers?”. NOTE: e**i*pi = -1 where e is Eulers irrational constant.I. CONCLUSIONS:
1. We have identified two distinct forms of multiplication, ie, accumulative vs decumulative multiplication, the difference being the accumulative form is a series of additions whereas the decumulative form is a series of subtractions. The sign of the Multiplier, M, identifies which form it is. 2. We have identified two methods of multiplication, dot-product multiplication and cross-product multiplication, We have adopted cross-product as the proper method to be used in both accumulative and decumulative multiplication. In doing so, we recognize the angle between between the Multiplier & multiplicand to be +90 degrees for accumulative multiplication as opposed to -90 degrees for decumulative multiplication. As a result, the sign of the Multiplier does not enter into the computation of the product. 3. The angle,, from the Multiplier to the multiplicand is
normally +90 degrees in order to make the sine() = +1,
thereby confirming that the M-axis is normally orthogonal
to the m–axis, albeit not eliminating other possibilities for
values of angle @, resulting in a wide variety of product
values and plus or minus direction.
4. The fact that both operands, M & m, reside on a different axis
as vectors means that the communitive law no longer applies,
disproving the idea that a minus times a plus is the same as
a plus times a ninus. It becomes like saying
6 cats are the same as 6 dogs.
Nothing has been done to change anything outside the realm of
conventional arithmetic & mathematics. Rather we have found
old precepts to be applied in new ways to open the door to
understanding some areas that left us perplexed. As a result, we
have uncovered a new way of perceiving multiplication, resulting
in the identification of decumulative multiplication as distinct
from traditional accumulative multiplication. We have uncovered
some interesting details about how we can graphically interpret
multiplication that involves what we call “direction” Finally, we
have shed important new light on an entity that has kept its
meaning hidden from us for so long,
ie, the imaginary number, “i”.