On the Genus of the Zero-Divisor Graph of <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-4.60088pt;width:25.375px;" id="M1" height="20.825001" version="1.1" viewBox="0 0 25.375 20.825001" width="25.375">
	
		
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<table>The reduction of <svg height="16.4125" id="M434" style="vertical-align:-3.25793pt" version="1.1" viewbox="0 0 45.25 16.4125" width="45.25" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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q0 45 -26.5 69.5t-68.5 24.5q-67 0 -120 -79l-20 20l43 63q51 56 127 56h1q66 0 107 -37t41 -95q0 -42 -31 -71q-22 -23 -68 -54z" id="x33"></path></g><g transform="matrix(.012,-0,0,-.012,32.974,16.212)"><path d="M241 635q53 0 94 -28.5t63.5 -76t33.5 -102.5t11 -116q0 -58 -11 -112.5t-34 -103.5t-63.5 -78.5t-94.5 -29.5t-95 28t-64.5 75t-34.5 102.5t-11 118.5q0 58 11.5 112.5t34.5 103t64.5 78t95.5 29.5zM238 602q-32 0 -55.5 -25t-35.5 -68t-17.5 -91t-5.5 -105
q0 -76 10 -138.5t37 -107.5t69 -45q32 0 55.5 25t35.5 68.5t17.5 91.5t5.5 105t-5.5 105.5t-18 92t-36 68t-56.5 24.5z" id="x30"></path></g>
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International Journal of Combinatorics

fig6

Figure 6

Figure 6: On the Genus of the Zero-Divisor Graph of <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-4.60088pt;width:25.375px;" id="M1" height="20.825001" version="1.1" viewBox="0 0 25.375 20.825001" width="25.375">
	
		
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