Ann: Bass Metals Operational Update, page-52

Interesting observation, but I seem to recall from my maths classes at school that ">" means "greater than". Therefore ">40%" to me means "greater than 40%".

Happy to be wrong, however.

	Symbol	Symbol Name	Meaning / definition	Example
1	=	equals sign	equality	5 = 2+35 is equal to 2+3
2	≠	not equal sign	inequality	5 ≠ 45 is not equal to 4
3	≈	approximately equal	approximation	sin(0.01) ≈ 0.01,x ≈ y means x is approximately equal to y
4	>	strict inequality	greater than	5 > 45 is greater than 4
5	<	strict inequality	less than	4 < 54 is less than 5
6	≥	inequality	greater than or equal to	5 ≥ 4,x ≥ y means x is greater than or equal to y
7	≤	inequality	less than or equal to	4 ≤ 5,x ≤ y means x is less than or equal to y
8	( )	parentheses	calculate expression inside first	2 × (3+5) = 16
9	[ ]	brackets	calculate expression inside first	[(1+2)×(1+5)] = 18
10	+	plus sign	addition	1 + 1 = 2
11	−	minus sign	subtraction	2 − 1 = 1
12	±	plus - minus	both plus and minus operations	3 ± 5 = 8 and -2
13	±	minus - plus	both minus and plus operations	3 ∓ 5 = -2 and 8
14	*	asterisk	multiplication	2 * 3 = 6
15	×	times sign	multiplication	2 × 3 = 6
16	⋅	multiplication dot	multiplication	2 ⋅ 3 = 6
17	÷	division sign / obelus	division	6 ÷ 2 = 3
18	/	division slash	division	6 / 2 = 3
19	—	horizontal line	division / fraction
20	mod	modulo	remainder calculation	7 mod 2 = 1
21	.	period	decimal point, decimal separator	2.56 = 2+56/100
22	ab	power	exponent	23 = 8
23	a^b	caret	exponent	2 ^ 3 = 8
24	√a	square root	√a ⋅ √a = a	√9 = ±3
25	3√a	cube root	3√a ⋅ 3√a ⋅ 3√a = a	3√8 = 2
26	4√a	fourth root	4√a ⋅ 4√a ⋅ 4√a ⋅ 4√a = a	4√16 = ±2
27	n√a	n-th root (radical)		for n=3, n√8 = 2
28	%	percent	1% = 1/100	10% × 30 = 3
29	‰	per-mille	1‰ = 1/1000 = 0.1%	10‰ × 30 = 0.3
30	ppm	per-million	1ppm = 1/1000000	10ppm × 30 = 0.0003
31	ppb	per-billion	1ppb = 1/1000000000	10ppb × 30 = 3×10-7
32	ppt	per-trillion	1ppt = 10-12	10ppt × 30 = 3×10-10