@@ 208-216 (lines=9) @@ | ||
205 | * |
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206 | * @return bool true if U, and hence A, is nonsingular |
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207 | */ |
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208 | public function isNonsingular() |
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209 | { |
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210 | for ($j = 0; $j < $this->n; ++$j) { |
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211 | if ($this->LU[$j][$j] == 0) { |
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212 | return false; |
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213 | } |
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214 | } |
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215 | ||
216 | return true; |
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217 | } |
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218 | ||
219 | // function isNonsingular() |
@@ 109-117 (lines=9) @@ | ||
106 | * |
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107 | * @return bool true if R, and hence A, has full rank, else false |
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108 | */ |
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109 | public function isFullRank() |
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110 | { |
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111 | for ($j = 0; $j < $this->n; ++$j) { |
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112 | if ($this->Rdiag[$j] == 0) { |
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113 | return false; |
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114 | } |
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115 | } |
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116 | ||
117 | return true; |
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118 | } |
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119 | ||
120 | // function isFullRank() |