Open main menu
Home
Random
Recent changes
Special pages
Community portal
Preferences
About Wikipedia
Disclaimers
Incubator escapee wiki
Search
User menu
Talk
Dark mode
Contributions
Create account
Log in
Editing
Magic square
(section)
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
===For bordered magic squares=== * A bordered magic square remains a bordered magic square after permuting the border cells in the rows or columns, together with their corresponding complementary terms, keeping the corner cells fixed. Since the cells in each row and column of every concentric border can be permuted independently, when the order ''n'' β₯ 5 is odd, there are <math>((n-2)! (n-4)! \dots \cdot 3!)^2</math> equivalent bordered squares. When ''n'' β₯ 6 is even, there are <math>((n-2)! (n-4)! \dots \cdot 4!)^2</math> equivalent bordered squares. In the example below, a square of order 5 is given whose border row has been permuted and (3!)<sup>2</sup> = 36 such equivalent squares can be obtained. {{col-begin|width=auto;margin:0.5em auto}} {{col-break|valign=bottom}} {| class="wikitable" style="margin-left:auto;margin-right:auto;text-align:center;width:10em;height:10em;table-layout:fixed;" |- | 1 || '''23''' || '''16''' || 4 || 21 |- | 15 || style="background-color: silver;"|14 || style="background-color: silver;"|7 || style="background-color: silver;"|18 || 11 |- | 24 || style="background-color: silver;"|17 || style="background-color: silver;"|13 || style="background-color: silver;"|9 || 2 |- | 20 || style="background-color: silver;"|8 || style="background-color: silver;"|19 || style="background-color: silver;"|12 || 6 |- | 5 || '''3''' || '''10''' || 22 || 25 |} {{col-break|valign=bottom|gap=1em}} {| class="wikitable" style="margin-left:auto;margin-right:auto;text-align:center;width:10em;height:10em;table-layout:fixed;" |- | 1 || 16 || 23 || 4 || 21 |- | 15 || style="background-color: silver;"|14 || style="background-color: silver;"|7 || style="background-color: silver;"|18 || 11 |- | 24 || style="background-color: silver;"|17 || style="background-color: silver;"|13 || style="background-color: silver;"|9 || 2 |- | 20 || style="background-color: silver;"|8 || style="background-color: silver;"|19 || style="background-color: silver;"|12 || 6 |- | 5 || 10 || 3 || 22 || 25 |} {{col-end}} * A bordered magic square remains a bordered magic square after each of its concentric borders are independently rotated or reflected with respect to the central core magic square. If there are ''b'' borders, then this transform will yield 8<sup>''b''</sup> equivalent squares. In the example below of the 5Γ5 magic square, the border has been rotated 90 degrees anti-clockwise. {{col-begin|width=auto;margin:0.5em auto}} {{col-break|valign=bottom}} {| class="wikitable" style="margin-left:auto;margin-right:auto;text-align:center;width:10em;height:10em;table-layout:fixed;" |- | 1 || 23 || 16 || 4 || 21 |- | 15 || style="background-color: silver;"|14 || style="background-color: silver;"|7 || style="background-color: silver;"|18 || 11 |- | 24 || style="background-color: silver;"|17 || style="background-color: silver;"|13 || style="background-color: silver;"|9 || 2 |- | 20 || style="background-color: silver;"|8 || style="background-color: silver;"|19 || style="background-color: silver;"|12 || 6 |- | 5 || 3 || 10 || 22 || 25 |} {{col-break|valign=bottom|gap=1em}} {| class="wikitable" style="margin-left:auto;margin-right:auto;text-align:center;width:10em;height:10em;table-layout:fixed;" |- | 21 || 11 || 2 || 6 || 25 |- | 4 || style="background-color: silver;"|14 || style="background-color: silver;"|7 || style="background-color: silver;"|18 || 22 |- | 16 || style="background-color: silver;"|17 || style="background-color: silver;"|13 || style="background-color: silver;"|9 || 10 |- | 23 || style="background-color: silver;"|8 || style="background-color: silver;"|19 || style="background-color: silver;"|12 || 3 |- | 1 || 15 || 24 || 20 || 5 |} {{col-end}}
Edit summary
(Briefly describe your changes)
By publishing changes, you agree to the
Terms of Use
, and you irrevocably agree to release your contribution under the
CC BY-SA 4.0 License
and the
GFDL
. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel
Editing help
(opens in new window)