I have "Mathematics of Poker", First Edition.
There seem to be quite a number of errors (not covered by the Errata) in "Example 16.4 - [0,1] Game #7" with the last table at the top of page 188.
The table is "For Y at y1 (indifference between betting and checking):".
The headings are wrong:
"Y raises" should be "Y checks".
"Y calls" should be "Y bets".
The values in those 2 columns are correct.
In the next column "Difference" there are 2 errors. The difference is computed as "Y checks" minus "Y bets". The first two lines are correct, but the next 2 are not correct:
"[x1,y1] .... -1" should be "[x1,y1] .... +1"
"[y1,1] .... +1" should be "[y1,1] .... -1"
In the "Product Column" there are 4 mistakes (2 because of the changes to the "Difference" column).
The first 2 rows are correct. The next 2 need to change because of the changes to the Difference column:
"[x1,y1] .... -1(y1-x1)" should be "[x1,y1] .... y1-x1"
"[y1,1] .... 1-y1" should be "[y1,1] .... -1(1-y1)"
The "Product" column for "Total" has 2 typos. The first is obvious, the second not so obvious.
Since there is no "y2" in the product column, this is clearly a typo.
"y2" should be "y1".
Not so obvoius until you actually add up the "Product" column is that the "+1" should be "-1". So the Product total is now:
2x2 + 2y1 - x1 - 1
The Product total line is repeated below the table with the 2 typos already identified.
Note, the second equation under the table is correct and is properly derived from the corrected Product total that I have given.
The first and third tables in this section also are not 100% correct, as I think you need to change one line and insert an additional line in each:
In the table "For X at x2":
"[0,y2]" should be "[0,x2]"
and another line should be inserted as:
"[x2,y2] +2 +2 0 0"
Since the Product column is 0, everything else in the table is correct.
The same type of change is needed to "For X at x1" for the line "[y2,y1]" splitting it into 2 lines:
[y2,x1] -1 -1 0 0
[x1,y1] +1 +1 0 0
Once again, since the Product columns both contain 0, everything else in the table is correct.
Tommy2+2